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  • -10%LimitedSold Out
    A’a Lava Slide £18.00 ex VAT

    A thin section of A’a Lava produced from the famous Laki Eruptions of 1783 – 1785 in Iceland. The thin section exhibits the highly vesicular nature of this extrusive volcanic rock. Each section is made to 30 microns thickness and the glass is 46 x 27 mm in size with a cover slip

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    Out of stock

  • Accretionary Lapilli Tuff £2.25£6.00 ex VAT

    Accretionary lapilli tuff is an igneous pyroclastic rock, these samples come from Longsleddle, Cumbria in the UK and forms when hot ash and debris is ejected from as volcano. Some of this material is held together by moisture and once heavy enough, falls into the ash below forming small ‘spots’ within the material, creating a speckled rock. The samples are suitable both for young and serious collectors as well as educational use and are supplied in various sizes with a card tray and label.

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    65 in stock

  • Actinolite In Talc £2.10£6.55 ex VAT

    Actinolite crystals within talc mineral specimens collected from the Mo i Rana, in the Helgeland region of Nordland, Norway, an excellent and striking mix of off white and deep green these samples are excellent for serious collectors, available in various sizes and supplied in a card tray with an information label.

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    2 in stock

  • Aegirine £1.90£6.55 ex VAT

    Aegirine mineral specimens from Sulitjelma, Norway, exhibiting dark green prismatic crystals within a white albeit or plagioclase feldspar matrix, the two contrasting colours make for an excellent eye catching specimen, available in various sizes and supplied in a tray with an information label.

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    36 in stock

  • Aeolian Sandstone £2.25£6.00 ex VAT

    Specimens of Aeolian Sandstone collected from Lazonby, near Penrith, Cumbria in the UK. This aeolian sandstone is Triassic in age – approximately 200 Ma. It belongs to the group of rocks known as the New Red Sandstone which date from the Permian (280 Ma) into the Triassic. The composition of this sandstone consists solely of spheroidal (millet seed) quartz grains with an iron oxide cement called haematite. It is the presence of this haematite that contributes to the distinct red – orange colouration of these samples. This lithology is typical of an aeolian (wind blown) hot desert environment. Available in multiple sizes, these specimens come supplied in a white card tray with information label.

    We also supply Aeolian Sandstone thin sections for microscope study which are available to buy HERE.

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  • Aeolian Sandstone (1kg) £8.00 ex VAT

    A Triassic red millet seed sandstone of aeolian desert origin. Samples come from Penrith, Cumbria and are supplied by weight.

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  • -10%Limited
    Aeolian Sandstone Slide £18.00 ex VAT

    Textbook desert sandstone microscope thin section ideal for educational use.These thin sections exhibit well rounded quartz clasts as you would expect from an aeolian transported sediment. The section is made to 30 microns thickness and the glass is 46 x 27 mm in size with a cover slip. Supplied in a protective card sleeve with a label, ideal for microscopy.

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    7 in stock

  • Agate Nodules £2.07£6.90 ex VAT

    Specimens of agate nodules from the former Ardownie Quarry, Broughty Ferry, Dundee, Scotland, UK. These mineral samples were part of an old stone masons collection and exhibit banded agate of various colours, a form of chalcedony, they break as such with a conchoidal fracture and can have sharp edges. Available in various sizes, the specimens are broken and rough without cutting or polishing. Excellent for collectors of Scottish minerals, they will make a fine addition to any collection.

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  • Agatised Bivalves (5 pcs) £1.50 ex VAT

    Excellent examples of bivalve fossil specimens which show the shells have been agatised, giving them an orange almost semi transparent colour and vitreous lustre, the morphology of the shells have been preserved very well as agate weather or deteriorates almost not at all as opposed to other minerals at the surface. The shells are between 20 to 40 mm in size and come from Morocco, unfortunately, for the time being, we do not have much more information regarding them such as specific species or age. But the unique agatisation of the samples makes them much more interesting to observe. Supplied in lots of 5 pieces, they come packaged in a polythene bag with information label.

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  • Agglomerate £2.25£6.00 ex VAT

    Agglomerate igneous rock specimens from Scotland, UK. A coarse grained, hard blocky rock exhibiting a conglomeration of various minerals and igneous material of volcanic origin. These samples formed part of the Glen Coe caldera and are apart of the upper streaky andesite unit, the exhibit poor sorting and orientation of material which indicates a somewhat violent origin but this can vary from agglomerates by location and is mainly down to the chemistry of the igneous material. The samples are available in 3 sizes and come supplied in a card tray with a label, they are suitable for educational use to show the different types of volcanic rocks produced as well as those interested in collecting rock samples.

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  • -10%Limited
    Agglomerate Slide
    Agglomerate Slide £18.00 ex VAT

    Agglomerate microscope thin section ideal for educational use. Agglomerate is a hard, coarse grained igneous rock exhibiting a conglomeration of various of various material of volcanic origin. These specimens were collected from Scotland, UK. The section is made to 30 microns thickness and the glass is 46 x 27 mm in size with a cover slip. Supplied in a protective card sleeve with a label, ideal for microscopy.

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    14 in stock

  • -10%Limited
    Algae Stromatolite Slide £18.00 ex VAT

    Algae stromatolite thin section, made from our own stock collected from Morocco, these rock has been made into a 30 microns thick slide which exhibits the fine texture of this rock specimen. Excellent to observe the nature of the minerals, these glass slide is 46 x 27 mm in size, suitable for enthusiasts, educational use and more, it will come in card sleeve with a label.

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    18 in stock

  • Almandine Garnets – China £2.07 ex VAT

    Almandine garnet crystals, from China, popular gemstones varying in size between 0.5 -1.0cm  with a good crystal habit, a deep red colour and vitreous lustre, these garnet crystals are ideal for collectors and for educational use, supplied in a polythene bag with a data label.

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    208 in stock

  • Almandine Garnets – Norway £1.50£10.00 ex VAT

    Specimens of Almandine Garnets, collected from Fauske, Norway. These garnets are deep red in colour, and most notably found in metamorphic rocks. Almandine garnets are a popular variety, as well as the most common. These specimens are available in four sizes and come supplied with an information label.

    Small: Approx 1cm

    Medium: Approx 2cm

    Large: 2+ cm

    Massive: Approx 2″

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  • Amazonite – Madagascar £2.00 ex VAT

    Vibrant amazonite mineral specimens from Madagascar. This particular variety contains white feldspar streaks giving the specimens a slightly graphic texture. Amazonite is a microcline feldspar mineral, sometimes known as ‘Amazon stone’, named after the famous Amazon river in Brazil. The mineral its self has a vibrant green colouration and are of a much higher quality than our Norwegian specimens.  These amazonite specimens are from Madagascar and come in just one size – approximately 2″ x 2″. Each piece is comes in a white card tray with information label.

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    39 in stock

  • Amazonite – Norway £1.50£5.95 ex VAT

    Amazonite mineral specimens from Norway, exhibiting a pale green colour, much less vibrant than the specimens from Russia, a variety of microline feldspar, these specimens are rare and stocked in limited amounts, available in only two sizes.

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    50 in stock

  • Amber – Black £2.07£2.30 ex VAT

    Amber from Sarawak, Borneo, these mineral and fossil specimens are found in the ancient coal measures around Indonesia, a variation known as glessite, this amber is from the Tertiary period, 15 to 25 million years old and is much harder than Baltic amber. It has a distinct brown colour but once under shortwave UV lighting, emits a pale blue which is calming to the eyes. Supplied in a card tray with a label.

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  • Amethyst – Brazil £1.00£6.95 ex VAT

    Amethyst is a purple variety of quartz owing its attractive colour to irradiation and iron impurities present at the time of formation. These crystal beds from Brazil are available in a range of optional sizes and will come supplied in a card tray with a label.

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    50 in stock

  • Sold Out
    Amethyst – Kilo Bag £18.00 ex VAT

    1 kilo of amethyst mineral specimens, these crystal beds are faded purple in colour showing typical crystal forms. Ideal for schools, educational and teaching use or for when bulk amounts are needed, specimens supplied are a range of sizes between 20 mm and 50 mm and come supplied in a polythene bag with an information card.

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    Out of stock

  • Amethyst (Massive) £1.50 ex VAT

    Specimens of Massive Amethyst, collected from Brazil. Amethyst is popular mineral, easily distinguishable due to its deep purple colouration. It is part of the quartz family of minerals, along with similar specimens such as citrine and rock crystal. These specimens are available in a 1.5″ x 1.5″ size, and come in a white card tray with an information label.

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  • Amethyst Points £2.07 ex VAT

    Amethyst crystal points collected in Brazil, detailing the typical trigonal crystal habit expected of quartz minerals, the specimens range in size from 30 to 50 mm in and show a pale purple colour slowly fading to white at the base. Supplied in a white card tray with a label.

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    12 in stock

  • Ammonite Pairs – Cut and Polished £3.00 ex VAT

    Cut and polished ammonite pairs, collected from Madagascar. Ammonites are one of the most distinctive and popular fossils in the world due to their distinctive spiral shell. These specimens are examples of their shells that have been cut and polished in order to show their inner workings. These specimens include both Desmoceras and Cleoniceras which both lived during the Lower Cretaceous period, approximately 110 – 102 million years ago. Each section measures approximately 3cm and come packaged as a pair in a polythene bag with information label.

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  • Ammonites – Polished (Madagascar) £25.00£75.00 ex VAT

    Stunning Cleoniceras ammonite specimens from Madagascar. These specimens have been polished helping to display their stunning suture lines which are highly visible on these ammonites. Cleoniceras is an extinct species of ammonite, dating to the lower Cretaceous period, over 102 million years ago. These specimens are available in three different sizes, and make a fantastic addition to any collection, whilst also being fantastic educational specimens on account of clearly showing the complex suture line of ammonites.

    Small: Approx 10cm diameter

    Medium: Approx 12cm diameter

    Large: Approx 14cm diameter

    Massive: Approx 17cm diameter

    All measurements taken at the widest points

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  • Amygdaloidal Basalt £2.25£6.00 ex VAT

    Amygdaloidal basalt is an igneous rock which is extrusive in nature, these specimens formed over 60 million years ago during the Tertiary period and come from Ireland. They are part of the Antrim lava group and exhibit a dark colouration with occurrences of amygdales containing quartz and calcite crystals. As a basalt they are somewhat dense, but lighter than pure samples due to the cavities within them which formed as a result of gaseous activity during their ejection. Over time, hydrothermal fluids pass through the rock and minerals form within the cavities, which gives the usually dark coloured rock a speckled appearance. These samples are available in various sizes and are suitable for higher educational use to detail the subtle differences between similar igneous rocks, they come supplied in a card tray with an information label.

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    60 in stock

  • Amygdaloidal Basalt (1kg) £8.00 ex VAT

    Amygdaloidal Basalt is a variety of basalt from the Isle of Skye, specimens are supplied in a polythene bag in lots of 1 kg with a label.

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    45 in stock

  • -10%Limited
    Amygdaloidal Basalt Slide £18.00 ex VAT

    Amygdaloidal basalt thin section slide exhibiting amygdaloids of varying sizes within a fine grained basaltic ground mass. This particular material was collected from the Isle of Skye, Scotland. Each section is made to 30 microns thickness and the glass is 46 x 27 mm in size with a cover slip. Supplied in a protective card sleeve with a label, ideal for microscopy.

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    5 in stock

  • Sold Out
    Analcime – Croft Quarry £1.50£5.00 ex VAT

    Specimens of Analcime from Croft Quarry, Croft, Blaby, Leicestershire, UK. These specimens vary between having red and white crystals. Specimens are available in multiple sizes and come in a white card tray with an information label.

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    Out of stock

  • Andesite £2.25£3.50 ex VAT

    Andesite igneous rock specimens of late Ordovician age which form part of the Barrowdale volcanic group. The rocks come from Cumbria, UK and have a dark colouration with a blue tint and may contain augite crystals. The rocks are intermediate in chemistry and suitable for higher level education to explain the difference in various igneous groups. Samples are available in 3 sizes and will come supplied in a card tray with an information label.

    We also supply Andesite thin sections for microscope study which are available to buy HERE.

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  • -10%Limited
    Andesite Slide
    Andesite Slide £18.00 ex VAT

    Andesite thin section microscope slide exhibiting an intermediate, fine grained groundmass with occasional phenocrysts of plagioclase feldspar.This material was collected from Borrowdale in the Lake District, UK & is of Late Ordovician age. The glass is 46 x 27 mm in size, supplied in a protective card sleeve with a label, ideal for microscopy, petrography and educational use.

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    6 in stock

  • Andradite Garnets £6.00£70.00 ex VAT

    Andradite garnet crystals with nepheline mineral specimens, collected from Khenifra Province,Tafilalet, Morocco. This rare species of garnet, which is melanite, belongs to the schorlomite group, the contrast between the two black and white minerals makes for an interesing piece to observe. This variant of garnet is rare, and has become a popular gemstone lately, they are jet black with a vitreous lustre and easily identifiable crystal form. Available in a variety of sizes, samples will come supplied in a card tray with a data label.

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    70 in stock

  • Angelite (Anhydrite) – Peru £1.50£8.00 ex VAT

    Angelite is a popular trade name for a variety of Anhydrite that is light blue-grey in colour, semi-transparent, fine grained and marketed as gem material. These specimens, along with most angelite, are from Lima, Peru and were collected near the Casapalca Mine at Casapalca, Huarochiri Province, Lima Department, Peru.

     

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  • Anhydrite £2.25£6.00 ex VAT

    Anhydrite mineral specimens exhibiting a soft hardness and crystalline texture, the pieces vary in colour between pale grey and white and were collected from Cumbria, they are available in 3 sizes and come supplied in a card tray with a label. An evaporite mineral, it is closely related to other such mineral including gypsum, halite,calcite and others.

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  • Anorthosite £2.25£6.00 ex VAT

    Anorthosite phaneratic igneous rock specimens of Protozoic age from the Rogaland province in Norway. The samples have an almost pure white colouration due to an abundance of plagioclase feldspar which comprises of most of the rock and exhibit a coarse grain size with visible with the naked eye and exhibiting a low density. The samples are suitable for the more serious or professional collector as well as higher level educational use and are available in three sizes and supplied in a card tray with a label.

    We also supply Anorthosite thin sections for microscope study which are available to buy HERE.

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  • -10%Limited
    Anorthosite Slide
    Anorthosite Slide £18.00 ex VAT

    Anorthosite is a phaneritic, intrusive igneous rock characterized by a predominance of plagioclase feldspar (90–100%), and a minimal mafic component (0–10%) including Pyroxene, ilmenite, magnetite, and olivine. These thin sections exhibit a rock which has been deformed and as such the once large plagioclase crystals have recrystallized to form much smaller crystals.

    We provide a full range of igneous, sedimentary, metamorphic and mineral thin sections. Click here to view them. Should you require a microscope, they can be found here.

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    6 in stock

  • -10%Limited
    Anthracite Coal Slide £18.00 ex VAT

    Anthracite coal microscope slides for viewing the magnified crystals which make up these rock specimens, excellent for enthusiasts and educational use, the slide exhibits the almost carbon content nature of anthracite, made to 30 microns thick, each slide comes supplied with a cover slip and cardboard sleeve.

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    9 in stock

  • Apatite £1.50£3.00 ex VAT

    Apatite mineral specimens from Madagascar, exhibiting an electric blue hue, these specimens have a crystalline texture and are in a massive form, minute occurrences of secondary minerals are present, they are available in small sizes and come in a white card tray or mag box with a data label.

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  • Apatite Crystals (Green) £3.00 ex VAT

    Apatite crystals found in Morocco with a green hue and a semi transparent appearance. These crystals very from 0.5 – 1.5cm and come supplied in a pack of 5 pieces. Specimens are supplied in a small polythene bag with a information label. Apatite is a phosphate mineral that has a vitreous lustre and a white streak but do not show good terminations. Its primary use is in the manufacture of fertiliser due it being a source of phosphorus. Apatite comes in a wide variety of colours and crystal habits, these samples are green in colour with a prismatic crystal habit. Supplied in a polythene bag with an information label.

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  • -10%LimitedSold Out
    Apatite Slide £18.00 ex VAT

    Microscope slides of apatite from Madagascar, these slides display the crystal structure of the mineral on a microscopic level which assists in the identification of this mineral in other slides. Each section is made to 30 microns thickness and the glass is 46 x 27 mm in size, supplied in a protective card sleeve with a label, ideal for microscopy & educational use.

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    Out of stock

  • Apophyllite £2.50£10.00 ex VAT

    Apophyllites mineral specimens showing excellent quality and detail, clear transparent crystals with trigonal terminations on a bed, these fabulous specimens come from Pune, India.

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  • Aquamarine Beryl – Portugal £0.92£1.15 ex VAT

    Specimens of aquamarine beryl found in Portugal. Specimens are supplied as either roughly 1 cm pieces in a small magnifier box or 2 – 3 cm pieces in a large magnifier box, all specimens come with a information label.

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  • Aragonite (Sputnik) £2.07£3.34 ex VAT

    Aragonite sputniks, also known as twinned aragonite crystals, these mineral specimens are roughly 40 to 50 mm in size, they exhibit an orange colouration and numerous radiating crystals similar to the Russian satellite, ‘Sputnik’. They come from Morocco and will come supplied in a card tray with a label.

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  • Aragonite Display Piece – 1 £45.00 ex VAT

    A stunning aragonite display piece, collected from Morocco. This specimen is a variation of aragonite known as aragonite groups. Aragonite is one of the two common, naturally occurring crystaliine forms of calcium carbonate, CaCO3 , the other being Calcite. This specimen features a botryoidal crystal crystal habit and is cream, off white colour. It measures approximately 20 x 13 x 9 cm at its widest and longest points, and features a weight of approximately 2500 grams. It is capable of standing freely. Due to the valuable and delicate nature of our display pieces, they will be shipping via courier option only. Supplied with an information label.

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    1 in stock

  • Aragonite Groups £5.54£11.50 ex VAT

    Aragonite crystal groups (or beds) from Morocco, exhibiting a calming white, yellow to brown colour and botryoidal crystal habit, available in larger sizes only they will come supplied with a data label. Ideal for the serious collector or as a talking piece.

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  • Aragonite Groups – Kilo Bag £6.00 ex VAT

    1 kilogram of aragonite crystal beds, or groups from Morocco, these mineral specimens exhibit an off white colouration and botryoidal crystal forms and sometimes stalactitic. A form of calcium carbonate, this product is sold by weight, pieces will vary in size between 20 mm to 60 mm and come supplied in polythene bag with a label.

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  • Aragonite Sputnik – 250g £7.00 ex VAT

    250 grams of aragonite sputniks, also known as twinned aragonite crystals, these mineral specimens are roughly 20 mmto 40 mm in size, they exhibit an orange colouration and numerous radiating crystals similar to the Russian satellite, ‘Sputnik’. They come from Morocco are supplied in a polythene bag with a data label, purchasing them by weight is ideal if they are intended for educational use, talks, kits or other events where larger quantities are required for an economical cost.

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  • Araneograptus murrayi £2.00 ex VAT

    Araneograptus murrayi fossil graptolite specimens which exhibit dendritic morphology. The samples are preserved within Fezouata shale deposits of lower Ordovician which is within the Drâa-Tafilalet region of Morocco and show the fan like structure this species had during life. A colonial animal, graptolites likely floated trough the ocean and filter fed, much similar to corals. The abundance of iron in the rock gives the shale and fossils a pale orange colouration. Graptolites themselves are important for geological dating as specific species can be used as zoning fossils to determine the age of strata, as such, these samples are not only suitable for enthusiasts but also educational use. They come supplied in a card tray with an information label.

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    291 in stock

  • Arsenopyrite with Pyrite and Chalcopyrite Display Piece – 1 £40.00 ex VAT

    A stunning display piece of arsenopyrite with pyrite and chalcopyrite on matrix, collected from Hingston Down, Cornwall. This specimen is composed of three main minerals which are a range of iron sulphides. Pyrite is an iron sulphide, whereas arsenopyrite is an iron arsenic sulphide, and chalcopyrite a copper iron sulphide. This specimen displays a beautiful array of brassy yellow and bronze colours on its surface. This is a large, dense specimen, measuring approximately 20 x 13 x 6 cm at its longest and widest points, and weighing just over 4300 grams. Due to the delicate and valuable nature of our display specimens, they are all shipped via courier only. Supplied with an information label.

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    1 in stock

  • Ashford Black Marble – Derbyshire £2.25£6.00 ex VAT

    Ashford Black Marble samples originate from Ashford-in-the-Water, Derbyshire, UK. Despite its name, this rock surprises many by being classified as a fine-grained Sedimentary Rock instead of a Metamorphic one. This classification is due to its true nature as a dark limestone rather than a genuine marble. Ashford Black Marble earns its reputation for ornamental purposes, showcasing a stunningly shiny black surface when cutting and polishing it. The rock’s origin dates back to the Carboniferous period, and it boasts a generous amount of bitumen, giving rise to its dark grey hue that transforms into a mesmerising glossy black appearance upon polishing. Supplied in various sizes, each specimen comes presented in a white card tray with an accompanying informative label.

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  • Atrypa – Morocco £5.00£12.00 ex VAT

    • Geological Age: Devonian period, 419 to 358 millions years old
    • Location: Morocco
    • Family: Brachiopod
    • Species: Atrypa sp.

    Atrypa specimens found in Morocco, these brachiopod fossils are supplied in various optional weights, they measure 1 to 2 cm in size and show excellent details such as shell form, shape, ribbing and more. The amounts received will vary depending on the weight purchased, the samples will come supplied in a polythene bag with an information label. Ideal for economical purchasing, where large amounts are required for little costs, such as for gift packs, crafts and educational use.

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  • Augen Gneiss £2.25£6.00 ex VAT

    Augen Gneiss is a foliated metamorphic rock with large crystals of lenticular or eliptical shear bound microcline.

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    13 in stock

  • Augite Andesite £2.25£6.00 ex VAT

    Augite andesite igneous rock specimens from Thirlmere, Cumbria, UK which are of late Ordovician age which form part of the Barrowdale volcanic group. The samples are of intermediate composition and contain phenocrysts of the pyroxene mineral, augite, giving the normally dark blue rock a black speckled appearance. The samples are available in 3 sizes and come supplied in a card tray with a label.

    We also supply Augite Andesite thin sections for microscope study which are available to buy HERE.

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    84 in stock

  • -10%Limited
    Augite Andesite Slide
    Augite Andesite Slide £18.00 ex VAT

    Augite andesite microscope thin section ideal for educational use. Andesite is a fine grained igneous rock and these specimens in particular, feature large phenocrysts of augite, a pyroxene mineral. The specimens used to create these slides, were collected from Thirlmere, Cumbria in the UK. The section is made to 30 microns thickness and the glass is 46 x 27 mm in size with a cover slip. Supplied in a protective card sleeve with a label, ideal for microscopy.

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    3 in stock

  • Augite Crystals (5 pcs) £6.00 ex VAT

    Specimens of Augite Crystals, collected from Africa. Augite is a common rock forming mineral and part of the pyroxene family. It is a silicate mineral and its primary composition includes calcium, magnesium and iron. It is most commonly found in igneous and metamorphic rocks, notably basalt and andesite. Augite is a mafic mineral, meaning it is dark in colour and has a hardness between 5.5 and 6 on Mohs Scale. These crystals are small, measuring approximately 0.5cm each. They come in packs of 5 pieces in a polythene bag with an information label.

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  • Augite Granophyre £2.25£6.00 ex VAT

    Augite granophyre igneous rock specimens from Carrockfell, Keswick in Cumbria, UK. Excellent pieces exhibiting a medium grain size of crystals which constitute this rock including, augite, quartz and feldspars and shows a granophyric texture. Suitable for avid collectors and higher educational use, the samples come supplied in a sized card tray with an information label.

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    84 in stock

  • Sold Out
    Azurite – Morocco £3.45£4.83 ex VAT

    Azurite: a soft, deep blue copper carbonate mineral formed from the weathering of copper ore. The azurite crystals on matrix are from Morocco.

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    Out of stock

  • Sold Out
    Banded Hornfels (1kg) £8.00 ex VAT

    Banded hornfels, showing excellent banded structure, samples come from Scotland and are supplied by weight in lots of 1 kilogram.

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    Out of stock

  • Banded Tuff £1.50£3.50 ex VAT

    Specimens of Banded Tuff, collected from Cumbria in the UK. Tuff is an igenous rock, formed when volcanic ash that is ejected from a vent during an eruption, is deposited and lithified into a solid rock. Tuff is often banded, as larger particles of fall first, with finer particles deposited on top as they fall later. These pieces are in limited stock and pink-brown in colour. Varying levels of banding shown in each piece. Available in three different sizes and come in a white card tray with an information label.

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  • Baryte – Cumbria £2.25£6.00 ex VAT

    Baryte, also known as barite, consists of barium sulphate and displays various crystal habits. These specific specimens come from Cumbria, UK, and have a bladed appearance. While predominantly white, some samples show a yellow-orange hue. However, baryte can occur in several other colours, including pink, orange, buff, or brown. These specific specimens were collected from Cumbria, UK, and are available in different sizes, presented in a white card tray with an accompanying information label.

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  • Baryte – Derbyshire £1.50£3.50 ex VAT

    Specimens of Baryte, collected from Derbyshire. Baryte is a dense, common, well known mineral. These specimens exhibit bladed crystals and range in colour from pale beige to off white. Specimens are available in multiple sizes and come in a white card tray with an information label.

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  • Baryte – Dirtlow Rake £2.25£6.00 ex VAT

    Specimens of Baryte, collected from Dirtlow Rake, Castleton, Derbyshire, UK. Baryte is a widely occurring mineral, consisting of barium sulphate. It is very dense and can occur with many crystal habits. These specimens are available in multiple sizes and come in a white card tray with an information label.

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  • Baryte – Foss Mine £2.57£5.62 ex VAT

    Baryte mineral specimens, unusual samples collected from Foss mine in Scotland, they have a fine crystalline texture instead and are quite robust specimens. Pieces are off white in colour and may show a shimmer effect in certain lighting conditions. Available in various sizes, supplied in a card tray with an information label.

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    29 in stock

  • Baryte – Somerset £2.25£6.00 ex VAT

    Baryte mineral specimens collected form Somerset in the UK, exhibiting a bladed crystal habit or massive form, the dense specimens are an off white, yellow or brown colour due to staining from hematite (iron ore), available in various sizes, ideal for educational use.

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  • Baryte (Cockscomb Mass) £2.40£3.65 ex VAT

    Baryte (also spelt barite) is a widely occurring mineral consisting of barium sulphate, they can occur with many crystal habits, in this case, these mineral specimens exhibit the cockscomb mass form, in which randomly orientated blades of the mineral occur on a massive bed. These particular specimens are a pink or orange colour with a pink bed but other colours of baryte exists, including white, buff or brown. Any barite specimen is incredibly dense, with small pieces even feeling heavier than they appear, which is surprising, considering it is a non metallic mineral. This density was how the mineral obtained its name, being derived from the Greek word ‘βάρυζ’ meaning heavy. It occurs in a range of environments and deposited via many processes including biogenic, hydrothermal and evaporation, among others. Commonly occurring in lead-zinc veins hence some of the samples contain galena (lead sulphide) as well. Over 75% of baryte extracted worldwide is used for weighting driling fluids in oil and gas exploration to control high formation pressures and prevent blowouts. These mineral specimens were mined in Mibladen, Morocco, they are available in various sizes, each specimen is supplied in a labelled card tray.

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  • Baryte Crystals – UK £2.88£5.75 ex VAT

    Specimens of crystalline baryte from Reigate, Surrey, UK. These particular pieces of baryte are crystals with various shades of yellow colour, the crystals are incomplete and therefore show no identifiable crystal system. Samples are supplied in a 1.5 ” x 1.5″ white card tray or in a plastic magnifier box with an information label. 

    Samples in small mag boxes are approximately 1 – 2 cm in size, samples in large mag boxes are roughly 2 – 3 cm in size. 

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  • -10%Limited
    Baryte Slide
    Baryte Slide £18.00 ex VAT

    Microscope slides of baryte from Cumbria, UK, these slides display the crystal structure of the mineral on a microscopic level which assists in the identification of this mineral in other slides. Each section is made to 30 microns thickness and the glass is 46 x 27 mm in size, supplied in a protective card sleeve with a label, ideal for microscopy & educational use.

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    4 in stock

  • Basalt £2.25£6.00 ex VAT

    Specimens of Basalt, collected from Northern Ireland. Basalt is a common, extrusive igneous rock, that forms when magma erupts and cools quickly on the Earth’s surface. These specimens are part of the Antrim lava group and date to the Tertiary period, around 60 million years ago. This is the same as the Basalt that makes up the famous Giant’s Causeway. The chemistry of these specimens suggests that the rock is olivine basalt, and comprises plagioclase feldspar, olivine and augite. These specimens are available in multiple sizes and come in a white card tray with an information label.

    We also supply Basalt thin sections for microscope study which are available to buy HERE.

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    12 in stock

  • Basalt (1kg) £8.00 ex VAT

    Igneous Basalt of Tertiary age from Northern Ireland. Specimens are typical black in colour and has a fine grained texture. Specimens are supplied in polythene bags in lots of 1 kg and are come with an information label.

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    74 in stock

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    Basalt Slide £18.00 ex VAT

    Basalt thin section slide exhibiting the fine grained, mafic nature of this extrusive igneous rock. Fine laths of plagioclase contrast beautifully against the bright coloured clinopyroxene making for an attractive thin section. Excellent for educational use.

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    8 in stock

  • Bauxite £2.25£6.00 ex VAT

    Bauxite is a brown or red earthy sedimentary rock and primary ore for aluminium, these mineral specimens come from Antrim, Northern Ireland and are of textbook quality, they are available in various sizes to choose from and will come supplied in a card tray with a data label.

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    276 in stock

  • Bauxite – (1kg) £8.00 ex VAT

    1 kilo of Bauxite sedimentary rock specimens from Northern Ireland, specimens are a typical earthy red or brown colour, comprised of iron and aluminium hydroxides/oxides. Bauxite was named after Baux, near St. Reny, Bouches-du-Rhône, France where it was discovered. The samples are supplied by weight in lots of 1 kilogram and will come in a polythene bag with an information card. Suitable for when large amounts are required.

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    9 in stock

  • Beryl £2.90£5.85 ex VAT

    Beryl specimens which detail somewhat clear crystal habits, one can see that the specimens have a slight hexagonal prism shape, these specimens from Evje, Southern Norway are green to yellow in colour and are available in 3 sizes, supplied in a card tray with a label.

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    20 in stock

  • Biotite Gneiss – Norway £2.25£6.00 ex VAT

    Biotite gneiss is a metamorphic rock found in Evje, Norway. These specimens exhibit alternating bands of black and white minerals, derived from quartz, plagioclase feldspar and biotite mica. Giving a surreal appearance, similar to the stripes of a zebra. The samples are available in various sizes and comes supplied in a card tray with a label.

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    73 in stock

  • Biotite Gneiss – Scotland £2.25£6.00 ex VAT

    Biotite gneiss is a metamorphic rock found in Blairgowrie, Perthshire in Scotland. These specimens exhibit faint alternating bands of black and white minerals, derived from quartz, plagioclase feldspar and biotite mica. Giving a surreal appearance, similar to the stripes of a zebra. The samples are available in various sizes and comes supplied in a card tray with a label.

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  • Biotite Gneiss (1kg) £8.00 ex VAT

    Biotite Gneiss rock specimens collected from Evje, Norway. Specimens will show banding. Specimens are supplied in a polythene bag in lots of 1 kg with a label.

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  • Biotite Granite £2.25£6.00 ex VAT

    Biotite granite igneous rock specimens from Ballachulish, Scotland, UK. Composed of the felsic minerals quartz and feldspar, with occurrences of biotite crystals. The rock has an overall white appearance due to its felsic chemistry but the black biotite mica offers a striking contrast in colours. The samples are ideal for both collectors due to the attractive nature and for college to university level education to describe the variations in granite which one may find. The samples are available in three sizes and supplied in a card tray with an information label.

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    65 in stock

  • Biotite Granite (polished) £1.50£6.00 ex VAT

    Biotite granite from Spain exhibiting plagioclase feldspar, quartz and biotite mica, specimens have been cut and polished on one surface allowing easy viewing of the crystals without the aid of magnification.

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    2 in stock

  • -10%Limited
    Biotite Granite Slide
    Biotite Granite Slide £18.00 ex VAT

    Biotite granite thin section exhibiting abundant biotite crystals within a typical granite crystal mass. These thin sections supplement the hand specimens nicely and allow the crystallisation history of the rock to be interpreted.

    We provide a full range of igneous, sedimentary, metamorphic and mineral thin sections. Click here to view them. Should you require a microscope, they can be found here.

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    6 in stock

  • Biotite Mica – Kilo Bag £5.00 ex VAT

    1 kilogram of biotite mica from Pakistan, this popular black variant of mica forms in sheets with an excellent basal cleavage, often refered to as books, they are ideal for educational material or kits, supplied by weight, the mineral specimens will come in a polythene bag with an information label.

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    35 in stock

  • Biotite Mica – Madagascar £2.25£6.00 ex VAT

    Specimens of biotite mica from Madagascar. These samples of biotite mica are of a higher quality than our specimens from Pakistan and Norway, they are supplied in a white card tray with an information label.

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  • Biotite Mica – Pakistan £2.25£3.50 ex VAT

    Biotite mica mineral specimens from Baluchistan, Pakistan available in moderately thick laminar sheets, as expected of this mineral, the samples exhibit a black colouration with a dull lustre. They serves as excellent examples of phyllosilicate minerals for collectors or educational use, with the pieces coming supplied in a labelled card tray.

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    986 in stock

  • Biotite Mica (Massive) – Norway £1.50£6.00 ex VAT

    Massive Biotite Mica specimens, collected from Arendal, Norway. These specimens depict a “massive” crystal structure, as opposed to the more commonly seen sheets. Like all biotite mica, these specimens are dark in colour, exhibiting a dark grey to black hue. Mica is one of the most common mineral groups, with biotite being the most abundant member. Biotite is very common in igneous and metamorphic rocks, with the dark minerals in granites, pegmatites and gneiss often being due in some part to the presence of this black mica. This massive biotite are available in limited supply so we recommend you move fast if you wish to add a piece to your collection. Supplied in a white card tray with information label.

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    Biotite Mica Slide £18.00 ex VAT

    Microscope slides of Biotite Mica from Norway, these slides display the crystal structure of the mineral on a microscopic level which assists in the identification of this mineral in other slides. Each section is made to 30 microns thickness and the glass is 46 x 27 mm in size, supplied in a protective card sleeve with a label, ideal for microscopy & educational use.

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    Out of stock

  • Biotite Muscovite Granite £2.25£6.00 ex VAT

    Biotite muscovite granite specimens from St. Austell in Cornwall, UK of Permian age is a coarse grained igneous rock composed of quartz, plagioclase feldspar, biotite and muscovite. The rock is part of the St. Austell pluton which formed 280 million years ago. An off white colour with gold and black flecks of micas, the rock has a unique chemistry and resulted in the rich mineralisation of ores in the area. The samples are suitable for collectors and educational use to show granite variants, available in three sizes. Each piece will come supplied in a card tray with an information label.

    We also supply Biotite Muscovite Granite thin sections for microscope study which are available to buy HERE.

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    75 in stock

  • Biotite Muscovite Granite (1kg) £8.00 ex VAT

    Coarse grained variation of granite, composed of quartz, feldspar, biotite and muscovite. These samples were collected from Liskeard, Cornwall and are ideal for educational use.

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  • -10%Limited
    Biotite Muscovite Granite
    Biotite Muscovite Granite Slide £18.00 ex VAT

    Biotite Muscovite Granite Thin Section ideal for educational use. Biotite Muscovite granite is a coarse grained rock and another variation of granite which is felsic in chemistry. This means its main constituent minerals are quartz and feldspar. These samples come from St. Austell in Cornwall, UK. The section is made to 30 microns thickness and the glass is 46 x 27 mm in size with a cover slip. Supplied in a protective card sleeve with a label, ideal for microscopy.

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    9 in stock

  • Bituminous Coal (1kg) £8.00 ex VAT

    Bituminous coal is a soft sedimentary rock with a high organic content & the tar-like substance Bitumen. It is of a lower grade than Anthracite but higher grade than Lignite. Supplied in lots of 1 kg.

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  • -10%Limited
    Bituminous Coal Slide £18.00 ex VAT

    Bituminous coal thin section slide.These thin sections exhibit more air pockets then their anthracite counterpart as to be expected being the less pure, more volatile rich variety. The slides are 30 microns thick and measure 46 x 27 mm in size.

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    7 in stock

  • Bixbyite Crystals on Topaz £2.00 ex VAT

    Specimens of topaz with bixbyite from Topaz mountain, Utah, USA. The bixbyite exhibits a black colour with metallic lustre, contrasting amazingly against the golden brown colour of the topaz crystals they are covering. The topaz crystals are around 1 – 3 cm in size and exhibit inclusions of small bixbyite crystals. The samples are small so will come supplied in a small polythene bag with an information label.

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  • Blue Baryte (Portway Gravel Pit) £1.50£6.00 ex VAT

    Specimens of Blue Baryte, collected from the Portway Gravel Pit. Castleton, Derbyshire. As is standard with baryte, these specimens are exceedingly dense and exhibit a bale blue colouration. These specimens are available in multiple sizes and come supplied in a white card tray with an information label.

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  • Blue Calcite £2.25£6.00 ex VAT

    Specimens of blue calcite from Mexico. These samples of blue calcite vary in colour from the typical light blue to a pale almost white, they are supplied in a card tray with an information label. These specimens are perfect for mineral collectors and ideal as a teaching aid.

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    25 in stock

  • Sold Out
    Blue Calcite £4.60£145.75 ex VAT

    Blue calcite mineral samples supplied by weight, this blue variation is due to the presence of oxidised copper impurities within the crystals. These particular samples also show the rhombic crystal structure of calcite and can easily be seen with the naked eye. When formed in masses such as these pieces, the samples are known as ‘massive’. This blue calcite is available by weight, starting from 500 grams, and is suitable for lapidary, educational and enthusiasts use. the pieces vary from 20 mm to 100 mm though most pieces will sit in-between and come supplied in a polythene bag with a label.

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    Out of stock

  • Sold Out
    Blue Lace Agate

    Blue lace agate mineral specimens of moderate size which clearly exhibit alternating bands of blue and white, the specimens come from Botswana and are excellent grade with minimal matrix on them. Formed through volcanic processes and the deposition of silica compounds in igneous rocks, these minerals are both important educationally and calming to look at.

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    Out of stock

  • Bornite £1.50£2.50 ex VAT

    Bornite mineral specimens from Congo, Africa exhibiting excellent text book iridescent blue colouration and a metallic lustre as well as the expected density. Bornite is a copper ore mineral which is often used in the educaitonal sector in geology and science lessons. When acid treated, it is known as peacock ore owing to its vibrant purple colours. Specimens are available in various sizes and come in a card tray with a label.

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    13 in stock

  • Bornite With Quartz and Feldspar £1.50£8.45 ex VAT

    Bornite with Feldspar and quartz, a strange and colourful mixture of minerals and crystals making a unique specimen, these pieces were collected by staff from Tysfjord, Northern Norway, due to the content, they have a vibrant metallic colouration and are available in 3 sizes, supplied in a card tray with a label.

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  • Boulder Clay £2.25£6.00 ex VAT

    Boulder clay from Yorkshire, UK from the Pleistocene period, shows random sized various clasts within a glacial clay matrix. Formed through various glacial or ice sheet processes, these sedimentary rocks are available in various sizes.

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  • Branch Coral £4.00£10.00 ex VAT

    Branching coral specimens, dated from the Devonian period, the species is known as thamnopora and belong to the tabulate form of these now extinct species. They clearly depict the colonial nature of this type, the small ‘pits’ on the surface of the coral, would have, during life, been hole, within which the coral polyps resided, emerging to feed, mate and more and retreating inside when potential danger was present. The samples were collected from the Western Sahara region of Morocco, available by weight, the pieces rang in size from 30 mm to 60 mm and come supplied in a polythene bag with an information label. Ideal for kits, sets, craft and educational use, where a numerous pieces may be required for an economical cost.

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    Breccia – Calcrete (1kg) £8.00 ex VAT

    This Breccia is a calcrete cemented scree deposit of Pleistocene age from the Manifold Valley in Staffordshire. Supplied by weight, comes in a thick polythene bag with an information label.

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    Out of stock

  • Breccia (Calcrete) £2.25£6.00 ex VAT

    Specimens of Breccia, collected from the Manifold Valley in Staffordshire. Breccia is a term that describes coarse grained sedimentary rocks, with large angular clasts, surrounded by a finer grained matrix. Calcrete binds the clasts in these specimens, forming on calcareous materials in response to climatic fluctuations in arid and semi-arid regions. These specimens are available in multiple sizes and come supplied in a white card tray with information label.

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    40 in stock

  • Breccia (Recent) £2.25£6.00 ex VAT

    Specimens of Breccia, collected from Yorkshire. Breccia is a term that describes coarse grained sedimentary rocks, with large angular clasts, surrounded by a finer grained matrix. These specimens date to the Holocene period, approximately within the last 11ooo years. These specimens are available in multiple sizes and come supplied in a white card tray with information label.

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    40 in stock

  • Brimstone – Elemental Sulphur £1.00£3.25 ex VAT

    Brimstone (elemental sulphur). A soft, bright yellow mineral. These specimens are a by-product of the oil & gas refining process.

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    30 in stock

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