Rocks, Minerals and Fossils Archives - Page 2 of 7

Brochantite £3.00 ex VAT
Specimens of Brochantite from Morocco. Brochantite is a visually captivating mineral known for its vivid green coloration. Its name is derived from the French mineralogist, Adolphe Brochant de Villiers.. This mineral belongs to the sulphate mineral group and is composed of copper, oxygen, sulphur, and hydrogen atoms. This is chemically represented as Cu4SO4(OH)6. Brochantite is typically found in oxidised copper deposits, often occurring in association with other secondary copper minerals such as malachite, azurite, and chrysocolla. It makes an ideal addition to any collection, as well as being a great educational piece. These specimens range between 1″ – 2″ and are supplied in a white card tray with information label.

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21 in stock
Brockram Breccia – Cumbria £2.25 – £6.00 ex VAT
Brockram Breccia specimens sourced from Hoff, Cumbria, UK. Breccia, a type of clastic sedimentary rock, is characterized by its coarse-grained and poorly sorted nature, containing large angular fragments embedded in a finer-grained matrix.

Brockram is a basal breccia, composed of cemented limestone and sandstone fragments originating from the Permian period. The Permian was the last period of the Paleozoic era and occurred approximately 299 – 251 million years ago.

These samples are available in various sizes and are presented in a white card tray along with accompanying information label.

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Bytownite Basalt £2.25 – £6.00 ex VAT
Bytownite basalt ( Bytownite feldspar) is another variation of the common Basalt rock. Basalt tends to to be a dark, fine, crystalline igneous rock and has a number of different variations. Bytownite feldspar is a calcium rich member of the Plagioclase family. The mineral was first described in 1835 & named for Bytown (now Ottowa) where it was found in Canada. High quality transparent examples are used to make faceted stone in the jewelllery trade. In these examples the phenocrysts are green & opaque & set in a basalt matrix. The specimens come from Cumbria, UK and are supplied in a white card tray with a label.

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

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189 in stock
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Bytownite Basalt Slide £18.00 ex VAT
Bytownite basalt thin section slide exhibiting phenocryts of bytownite feldspar within a fine basaltic groundmass. These thin sections depict beautifully a textbook porphyritic texture. Each section is made to 30 microns thickness and the glass is 46 x 27 mm in size.

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7 in stock
Calceola sp. £2.50 ex VAT
Fossil specimens of the solitary coral Calceola. The coral is from the Devonian period (lower – middle) and was found in the Western Sahara.

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Calcite (Optical) – Iceland Spar £1.50 – £2.50 ex VAT
Iceland spar is a clear variation of calcite, it exhibits the rhombic crystal system of calcite perfectly, the crystals easily divide into rhombs, making them well sought after for a variety of reasons. Originally reported from Helgustadir Mine, Eskifjord, Iceland, hence its name. One of the most remarkable aspect of Iceland spar is its refractive properties. When light passes through one of the crystals, it is divided into two rays at different angles which results in a double refraction effect. Essentially, anything seen though the crystal is seen in double. This can best be seen if you place the calcite over some text, it will appear as if it has been printed twice. These mineral samples come from Santa Eulalia, Chihuahua, Mexico and are available in 2 sizes: Upto 1″ and Over 1″. They come in a card tray with an information label.

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Calcite and Quartz Geode £2.25 – £8.00 ex VAT
Specimens of Calcite and Quartz Geodes, collected from Morocco. Geodes are popular geological formations which start as bubbles of gas within magma. These particular geodes contain crystals of both dogtooth calcite and quartz. Specimens are available in multiple sizes and come in a white card tray with an information label.

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Calcite over Sphalerite Display Piece – 1 £35.00 ex VAT
A stunning display piece of Calcite over Sphalerite, collected from the Trepca Mine, Stan Terg, Mitrovica in Kosovo. Sphalerite is a zinc sulphide mineral, as well as the primary zinc ore. This piece showcases shiny grey sphalerite crystals alongside white calcite. This superb display piece measures approximately 12 x 5 x 5 cm at its longest and widest points. It weights approximately 395 grams and is capable of standing freely. Due to the valuable nature of our display specimens, they will all be shipped via courier only. Supplied with an information label.

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1 in stock
Calcite Rhomb £1.50 – £2.25 ex VAT
Calcite rhomb mineral specimens exhibiting excellent rhomic crystal form expected of calcite, the pieces come from Morocco and as expected, will fizz, bubble and release CO2 if the hydrochloric acid test is performed. They are available in 2 colours and will be supplied in a card tray with an information label.

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Calcite Rhombs (1kg) £7.00 ex VAT
Specimens of Calcite Rhombs, collected from Morocco. Calcite is a common mineral with various forms and colours. It is most recognisable by its low Mohs hardness of 3, and its high reactivity with even weak acids. These specimens come in lots of 1kg, in a heavy duty polythene bag. Pieces come in various sizes.

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Calcite Slide £18.00 ex VAT
Microscope slides of Calcite from Morocco, 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
Cannel Coal £2.25 – £6.00 ex VAT
Cannel coal by it’s physical morphology and low mineral content is considered to be coal but by its texture & organic matter content it is considered to be oil shale. Although historically the term cannel coal has been used interchangeably.

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

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200 in stock
Cannel Coal (1kg) £8.00 ex VAT
Cannel coal by it’s physical morphology and low mineral content is considered to be coal but by its texture & organic matter content it is considered to be oil shale. Available by weight in lots of 1 kilogram.

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Cannel Coal Slide £18.00 ex VAT
Cannel coal thin section microscope slide exhibiting the highly organic nature of this sedimentary rock. This material was obtained from the Alexander open cast pit in Wigan, Lancashire. Ideal for microscopy, petrography & educational use.

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10 in stock
Cannonball Limestone £2.50 ex VAT
Specimens of Cannonball Limestone, collected from around the Hartlepool area, in the UK. This is a very distinctive and rare form of limestone known as Cannonball rock. It is part of the Rocker formation; a basin slope deposit which comprises part of the Zechstein Group. This is a highly studied sedimentary formation which dates to the Mid to Late Permian Period. These specimens are small, and come supplied in a 1.5″ x 1.5″ plastic magnifier box with an information label.

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5 in stock
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Carnelian (1kg) £10.00 ex VAT
Specimens of Carnelian, collected from India. These specimens exhibit a waxy lustre and red-orange colouration. Specimens come in lots of 1kg, in a heavy duty polythene bag. Pieces come in various sizes.

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Out of stock
Carnelian Pebbles £3.00 – £6.00 ex VAT
Beautiful carnelian pebbles, cut and polished and sourced from Madagascar. The intensity of the colouration and design of these of these pebbles varies from piece to piece, but each specimen exhibits the distinctive red, brown or orange hue that is typical of carnelian. The colouration comes from the prescence of iron oxide impurities during formation. Carnelian its self is a silica mineral, a variety of chalcedony, which in turn is within the quartz family of minerals. It is known to have been used as far back as 1800 BC as a gemstone or decorative stone.

Available in three sizes.

Small: Approx 4-5 cm

Medium: Approx 5 – 6 cm

Large: 6+ cm

You can also find similar labradorite pebbles HERE!

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Carstone (Ironstone) £2.25 – £6.00 ex VAT
Carstone (sometimes spelt carrstone) is a sedimentary rock which has a distinct, rusty red colour. These particular specimens found in Wesctott, Surrey formed during the Cretaceous period, a friable rock, it is iron rich, obtaining its colour from leaching. Used commonly as a building stone, the samples we have available have various size options and come supplied in a card tray with a label.

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

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50 in stock
Celestine (Blue) – Madagascar £2.30 – £5.54 ex VAT
Celestine occurs as crystals, and also in compact massive and fibrous forms. It is mostly found in sedimentary rocks, often associated with other minerals such as gypsum and halite. Celestine is found all around the world however pale blue celestine crystals such as these pieces are found in Madagascar. Celestine is a mineral consisting mainly of strontium sulphate and is the primary source of strontium.

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Celestine (Morocco) £2.88 – £4.95 ex VAT
Celestine mineral specimens from Morocco, these samples have a pale blue colouration and are more translucent than the Madagascan material, the crystals tend to be less well formed and smaller but ideal for those on a budget or for educational use. Available in 2 sizes and supplied in a card tray with a label.

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Celestine Display Piece – 1 £48.00 ex VAT
A stunning piece of celestine on matrix, collected from Yate, Bristol. Celestine is a dense mineral, composed of strontium sulphate. This is a large specimen, measuring approximately 23 x 14 x 11 cm at its longest and widest points. It weighs approximately 5000 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
Cerussite £4.03 – £17.25 ex VAT
1.5" x 1.5"2" x 2"3" x 2"3" x 3"4" x 3"
Cerussite crystal beds, a well sought after mineral specimen due to the clean, clear crystals and their rarity. The crystals typically have an orthorhombic habit and is found along side the cockscomb mass variation of baryte,making for a dense specimens. We have various sizes in stock and specimens come from Mibladen, Morocco.

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Cerussite Crystals £0.80 ex VAT
Cerussite crystals, collected from Morocco. Cerussite is a lead carbonate mineral and lead ore. The name was derived from the word ‘cerussa’ in Latin, which was used by miners’ during the 1800’s and means lead-spar or white lead ore, an allusion to its dense weight and often white colouration. Under good conditions, cerussite will often form good orthorhombic crystals, similar to that of aragonite. It typically has a conchoidal fracture and is 3 to 3.75 on the Moh’s scale. Each crystal measures approximately 1-2cm and comes supplies individually, in a polythene bag with information label.

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90 in stock
Chalcedony £2.07 – £6.21 ex VAT
Chalcedony mineral specimens from Morocco, the pieces belong to the quartz family of minerals and is very similar to carnelian, even having a waxy lustre, although it tends to have a botryoidal crystal habit. The pieces are blue, white, red and orange and available in various sizes, supplied in a card tray with an information label.

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Chalcedony (1kg) £7.00 ex VAT
Specimens of Chalcedony, collected from Morocco. Chalcedony is a silicate mineral, with a waxy lustre and botryoidal appearance. These specimens come in lots of 1kg, in a heavy duty polythene bag. Pieces are of various sizes.

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Chalcedony (France) £2.25 – £8.00 ex VAT
Specimens of Chalcedony, collected from Alabaster Coast, Normandy, France. Chalcedony is a silicate mineral and part of the quartz family. These specimens range from pale blue/purple to deep orange/brown in colour. They are available in multiple sizes and come in a white card tray with an information label.

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Chalcedony Nodule £1.50 – £2.25 ex VAT
Chalcedony mineral specimens from Morocco, the pieces belong to the quartz family of minerals and is very similar to carnelian, even having a waxy lustre, although it tends to have a botryoidal crystal habit. The pieces are white, grey and black and available in various sizes, supplied in a card tray with an information label.

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200 in stock
Chalcocite – Sweden £1.50 – £12.00 ex VAT
Specimens of Chalcocite (also known as chalcosine), collected from Kesebol, Sweden. Chalcocite is a copper sulphide mineral and is of great economic importance due to it being a major copper ore. The reason why chalcocite is such an important ore, is due to it featuring a copper content of around 80%. This makes it a very copper rich mineral. Chalcocite is typically dark grey to black in colour, and it is not uncommon for it to be associated with secondary copper minerals such as chalcopyrite or bornite. These specimens are available in multiple different sizes, and come supplied in a white card tray with information label.

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Chalcopyrite – France £1.50 – £3.50 ex VAT
Specimens of Chalcopyrite, collected from France. Chalcopyrite is a major copper ore. It has a brassy yellow colour and metallic lustre. Over time, this lustre will fade however as oxidation occurs. These specimens are available in multiple sizes and comes in a white card tray with an information label.

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25 in stock
Chalcopyrite – Morocco £1.15 – £2.59 ex VAT
Chalcopyrite mineral samples from Morocco, exhibiting typical yellow brassy colour with a metallic lustre. Lower grade when compared to our Norwegian stock but also includes occurrences of bornite which is a blue colour. Samples are available in 3 sizes, each supplied in a labelled card tray.

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184 in stock
Chalcopyrite – Norway £2.25 – £6.00 ex VAT
Chalcopyrite mineral specimens from Sulitjelma, Norway, a major copper ore mineral, these pieces exhibit excellent quality chalcopyrite detailing the shiny brassy yellow colouration and metallic lustre expected. These mineral specimens are approximately 70% – 80% chalcopyrite and are available in various sizes and come supplied in card tray with an information label.

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Chalcopyrite (1kg) £10.00 ex VAT
Specimens of Chalcopyrite, collected from Morocco. Chalcopyrite is a major copper ore, with a brassy yellow colour and metallic lustre. This lustre dulls over time however as oxidation occurs. These specimens come in a heavy duty polythene bag with pieces of various sizes.

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Chalcopyrite with Peacock Ore – Norway £2.25 – £6.00 ex VAT
Specimens of Chalcopyrite with Peacock Ore, collected from Sulitjelma, Norway. Chalcopyrite is a major copper ore with a brassy yellow colour and metallic lustre. These specimens have slight inclusions of peacock ore which may show up as pink, purple or blue spots. These specimens are available in multiple sizes and come in a white card tray with an information label.

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Chalk £2.25 – £6.00 ex VAT
Specimens of Chalk, collected from Yorkshire, in the UK. Chalk is a soft, white, porous sedimentary carbonate rock and form of limestone. It forms in reasonably deep marine conditions, by the gradual accumulation of minute calcite plates, known as coccoliths, which shed from micro-organisms called coccolithophores. Additionally, it is not uncommon to find flint or chert nodules embedded in chalk. These specimens are Cretaceous in age, available in multiple sizes, and supplied in a white card tray with information label.

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

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266 in stock
Chalk (1kg) £8.00 ex VAT
Chalk is a fine, porous, white form of limestone of Cretaceous age. Formed from the accumulation of coccoliths in a relatively deep marine environment. Supplied by weight, sizes vary.

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73 in stock
Chalk (Red) £2.25 – £6.00 ex VAT
Red chalk is early Cretaceous in age. It is chemically very similar to the later & better known white chalk.

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70 in stock
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Chalk Slide £18.00 ex VAT
Chalk thin section microscope slide composed of the debris of calcareous planktonic algae i.e. minute calcite shells known as Coccoliths which detach from micro-organisms known as Coccolithophores. This material is Cretaceous in age and it came from Yorkshire. The glass is 46 x 27 mm in size, supplied in a protective card sleeve with a label, ideal for microscopy, petrology & educational use.

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5 in stock
Chert – Foss Mine £2.25 – £6.00 ex VAT
Specimens of chert found in Foss mine, Scotland, UK. Specimens are supplied in a white card tray with an information label.

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15 in stock
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Chert Slide £18.00 ex VAT
Chert microscope slide exhibiting interlocking crystals of quartz characteristic of this silica rich microcrystalline, cryptocrystalline sedimentary rock. These thin sections offer an insight into the varying shades of quartz under crossed polarised light and the relationship between crystals in crystalline sedimentary rocks

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2 in stock
Chiastolite Slate £2.25 – £6.00 ex VAT
Chistolite slate is a variation of slate which also contains chiastolite crystals within it,the slate its self is either a brick red or plum colour with the chiastolite crystals appearing as white lines and randomly orientated within the rock matrix. rock specimens are available in various sizes and will be supplied in a labelled card tray.

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Chiastolite Slices – China £2.30 – £3.45 ex VAT
Specimens of cut and polished or lacquered Andalusite (variety Chiastolite) found in China. Specimens are supplied in a white card tray with a information label.

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Chlorapatite With Phlogopite Mica £2.07 – £5.54 ex VAT
Specimens of Chlorapatite with Phlogopite mica and Enstatite changed to Steatite (talc), found in Ødegärden Mines, Bamble,
Southern Norway. Available in a range of sizes.

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Out of stock
Chrome Diopside – Norway £2.00 – £12.00 ex VAT
Specimens of Chrome Diopside that were collected from the Gusdal Olivine Pit, Åheim, Norway. These samples are best described as chrome bearing diopside. Diopside, a vivid green pyroxene mineral, features streaks of grey chromite that creates a stunning mineral sample that would be the perfect addition to any collection. Whilst many samples of chrome diopside tend to be crystalline in nature, our samples are unique as the feature a grainier, more crumbly texture. These specimens are in limited availability, so we recommend you move fast if you wish to add these stunning specimens to your collection. They are available in a range of sizes and come supplied in a white card tray with information label.

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Chrome Diopside Crystals £4.00 ex VAT
Specimens of Chrome Diopside Crystals, collected from Pakistan. Diopside is a pyroxene mineral, with a distinct green colour. These specimens are a very dark green, are are examples of singular chrome diopside crystals. These specimens measure approximately 2cm each, and come in a polythene bag with an information label.

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8 in stock
Chrome Diopside In A Calcite And Tremolite Matrix £2.07 – £5.54 ex VAT
Specimens of Chrome Dioside in a Calcite and Tremolite matrix found in Mo i Rana, Norway. Limited amounts available. Each specimen is supplied in a labelled card tray.

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45 in stock
Chromite £2.07 – £7.71 ex VAT
Chromite mineral specimens from Feragen chromium mines, Feragen, Røros, Sør-Trøndelag, Norway. Specimens are found along side many dunitic rocks as expected of this site, they are black in colour and fairly dense, available in a range of sizes, each supplied in a labelled card tray.

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Chrysocolla – Scotland £1.50 ex VAT
Specimens of Chrysocolla, collected from Wanlockhead, Scotland. Chrysocolla is a copper silicate mineral with a distinct blue colouration. These specimens are available in multiple sizes and come in a white card tray with an information label.

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Chrysocolla in Talc – South Africa £2.25 – £6.00 ex VAT
Specimens of Chrysocolla in Talc, collected from South Africa. These specimens are smooth to touch and display a pale blue/green colouration. They are available in multiple sizes and come in a white card tray with an information label.

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Cinnabar £3.45 ex VAT
Cinnabar mineral specimens from Almaden, Spain. Also known as cinnabarite, this mineral is the primary ore of mercury and is considered poisonous if ingested. Handling is not recommended but if so hands should be washed immediately afterwards. The mineral specimens exhibit a soft texture and have an earth crystal form. They also detail a brick red colouration as expected. Available in small sizes only and supplied in a polythene bag and a plastic box.

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Cleavelandite £2.25 – £6.00 ex VAT
Cleavelandite is a variety of the mineral albite, one of the constituent minerals of plagioclase feldspar, thus is found in areas where pegmatites and granites exists in certain localities around the world. These particular specimens come from Evje, in Southern Norway and as expected, has a pale green colouration to it. As with albite, cleavelandite also exhibits a triclinic crystal habit and has a hardness of 6- 7 on the Moh’s scale of hardness, it is usually found within cavities of other rocks or minerals. It as named in 1823 by Henry J. Brooke in honor of Parker Cleaveland , professor of geology and mineralogy at Bowdoin College in Maine. Our mineral specimens are massive in form with occasional accessory such as smokey quartz or plagioclase or orthoclase feldspar. The specimens were collected by our own staff from Evje and are available in a range of sizes. Each specimen is supplied in a labelled card tray.

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Coal – Anthracite £2.25 – £6.00 ex VAT
Anthracite coal specimens, a vitreous, high grade coal with a hard and compact nature, these samples are from the Carboniferous coalfields of South Wales, UK and are one of the coals which have fewer impurities and a high carbon contents. Available in optional sizes, each sample will come supplied in a card tray with a label.

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

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194 in stock
Coal (Bituminous) £2.25 – £3.50 ex VAT
Specimens of Bituminous Coal, collected from the Carboniferous deposits in Yorkshire. Bituminous Coal is an organic sedimentary rock, that forms by diagenetic and sub metamorphic compression of peat bog & swamp material. Its primary constituents are macerals: vitrinite, and liptinite. The carbon content of bituminous coal is around 60-80%. The rest consists of residual water, air, hydrogen, and sulphur. These specimens are available in multiple sizes and come in a white card tray with an information label.

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

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Cobaltoan Dolomite £13.00 – £29.00 ex VAT
Cobaltoan dolomite from the Kamoto mine in the Democratic Republic of Congo, Africa, well known for it’s striking pink colouration, this variation of the mineral, dolomite is quite rare, with only 5 known localities in the world. Specimens are available in various sizes and come in a card tray with a label. Exhibits excellent crystal beds with vibrant colours on a limestone matrix.

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Conglomerate – Farringdon £2.25 – £6.00 ex VAT
Specimens of Conglomerate, collected from Farringdon, Berkshire in the UK. Conglomerate is a term used to describe a group of coarse grained sedimentary rocks, featuring large well rounded clasts in a finer grained matrix. They were laid down in a high energy environment, either fluvial, alluvial or shallow marine. The roundness of the clasts can be an indicator of the transport distance or the action of sustained erosion. These specimens are available in multiple sizes and come supplied in a white card tray with an information label.

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

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200 in stock
Conglomerate (1kg) £8.00 ex VAT
Conglomerate with well rounded clasts from Faringdon, UK. A good example of the lithotype as opposed to a Breccia which would contain predominantly angular to sub-angular clasts. Supplied by weight in bags weighing 1 kilo.

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Conglomerate (Fossiliferous) – Farringdon £2.25 – £6.00 ex VAT
Specimens of fossiliferous conglomerate, collected from Farringdon, Berkshire. The term conglomerate describes a coarse grained, clastic sedimentary rock composed of a substantial proportion of rounded grains. These conglomerate specimens, despite also being from Farringdon, differ from our other clonglomerate (which you can find HERE) due to the prescence of various fossiliferous remains. These different fossil fragments include bryozoa, brachiopods and bivalves. These specimens are cretaceous in age, available in three sizes, and supplied in a white card tray with information label.

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Conglomerate Slide £18.00 ex VAT
Conglomerate thin section slide exhibiting abundant rounded biogenic and clastic sediments held in place by either a fine grained matrix and/or calcite cement collected from Farringdon. The 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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6 in stock
Connemara Marble £1.50 ex VAT
A rare, green marble dating back some 700 million years to the end of the Pre-Cambrian. This marble comes from the Streamstown quarry in Clifden, Co. Galway. Specimens ( max size 3″ x 2″) are supplied in a labelled card tray.

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Copper – Native £2.00 – £7.00 ex VAT
Native copper ore mineral specimens from the famous Keweenaw copper deposits of Mitchigan, U.S.A. The specimens have a heavy red-orange metallic specimens with streaks of blue-green oxidation and a wiry crystal habit. Available in a range of sizes.

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Coral Limestone – Anglesey £2.25 – £6.00 ex VAT
Specimens of Coral Limestone, collected from Anglesey. Limestone is a common, well known sedimentary rock. It consists of the calcium-rich shells, bones, and skeletons of the fauna that dominated during that period. These specimens date to the Palaeozoic era around 300 million years ago. They were laid down in shallow tropical seas around 300 million years ago, in the Carboniferous. The composition of these specimens is primarily Lithostrotion corals. They are available in multiple sizes and come supplied in a white card tray with an information label.

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

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50 in stock
Coral Limestone (1kg) £8.00 ex VAT
Carboniferous coral limestone from Anglesey, North Wales. Composed largely of well preserved Lithostrotion corals, supplied in lots of 1 kilogram.

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Coral Limestone Slide £18.00 ex VAT
Coral limestone Slide micro scope slide exhibiting a cross section through carboniferous Lithostrotion coral within a calcite cement. Excellent to observe the nature of the minerals and interpret the history of the rock. The 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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6 in stock
Cordierite Hornfels £2.25 – £6.00 ex VAT
This variation of Hornfels exhibits strong banding with small crystals of Cordierite.The samples were collected from near Carrock Fell. Cumbria, UK.

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

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33 in stock
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Cordierite Hornfels Slide £18.00 ex VAT
Cordierite Hornfels thin section microscope slide exhibiting a dark colour and a characteristic none crystalline form. Fine grains fit together like the fragments of a mosaic, this is often referred to as rough pavement or pavement structure. Larger crystals of cordierite can be seen scattered throughout the fine matrix.

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6 in stock
Corundum var. Ruby £2.30 – £12.65 ex VAT
Corundum mineral specimens with a red colouration, known as ruby, a semi precious gemstone, these samples exhibit the hexagonal crystal system very well, with their large sizes, they are excellent for use in educational sectors to display this. Available in a range of sizes see below for details, the crystals come supplied in various forms with an information label.

Specimens are available in the following sizes.
- Small – Approximately 3 cm in diameter and roughly 50 grams in weight.
- Medium – Approximately 4 cm in diameter and roughly 85 grams in weight.
- Large – Approximately 5 cm in diameter and roughlt 175 grams in weight.
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15 in stock
Corundum var. Sapphire – Madagascar £2.00 ex VAT
Specimens of Corundum (var Sapphire), collected from Madagascar. Corundum is in aluminium oxide mineral with a hardness of 9 on Mohs Scale. This means it has industial uses as an abrasive as it can scratch almost any other mineral except diamond. These crystals vary in size between 0.5 – 1 cm in length approximately. They come in lots of 10 grams in a polythene bag with an information label.

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50 in stock
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Corundum var. Sapphire – U.S.A. £2.07 ex VAT
Specimens of pale blue corundum also known as sapphire from the U.S.A, supplied in a small polythene bag with an information label. Ideal for collectors of crystals. Crystals vary in size from roughly 2 – 3 cm in length.

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Out of stock
Cretaceous Sandstone £2.25 – £6.00 ex VAT
Specimens of Sandstone, collected from Philpots Quarry, West Sussex, in the UK. This sandstone is from the Wealden Group (Hastings sub-group), which dates it to the Lower Cretaceous. This makes these rocks approximately 110 million years old. This Cretaceous sandstone is yellow to buff in coloured, and particularly fine grained. It exhibits large scale cross bedding, which is indicative of fast flowing tidal currents. It is quite soft , friable and flaggy in places and so is extracted mainly for concreting and building sand. These specimens are available in multiple sizes and come supplied in a white card tray with information label.

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

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43 in stock
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Cretaceous Sandstone Slide £18.00 ex VAT
Cretaceous sandstone thin section slide exhibiting the well sorted, fine and rounded nature of this arenaceous sandstone.The slides are 30 microns thick and measure 46 x 27 mm in size and have a cover slip of the section along with a protective cardboard sleeve.

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11 in stock
Crinoid Stem – Lancashire £1.50 ex VAT
• Geological Age: Carboniferous period
• Location: Clitheroe, Lancashire, UK
• Family: Echinoderm
• Species: Crinoid

Fossil crinoid stems from Clitheroe, Lancashire, these specimens are excellent for collectors and educational use, they are of an fairly good size where morphological details can be easily seen, ranging from 40 to 60 mm in length and varying thicknesses. They samples will come supplied in a card tray with a label.

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Crinoid Stem (5 pcs) – Morocco £1.00 ex VAT
• Geological Age: Silurian period, 443 to 416 millions years old
• Location: Djebel Issoumour, Alnif, Morocco
• Family: Echinoderm
• Species: Crinoid

Moroccan fossil crinoid stem specimens supplied in packets of 5 pieces, dated to over 400 million years old, they lived during the Silurian period and show excellent clear morphological details such as stem segments. Ideal for educational use and young collectors.

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Crinoid Stems – Lancashire £4.00 – £10.00 ex VAT
• Geological Age: Carboniferous Period
• Location: Lancashire, UK
• Family: Echinoderm
• Species: Crinoid

Crinoid stem fossils collected from Lancashire, UK. These fossil specimens from the Silurian period, exhibit the segmented nature of crinoid stems, varying between 30 to 50 mm in length and 10 to 20 mm in diameter, the samples are supplied in optional weights, making them perfect where a certain amount is needed for an economical costs, such as for schools, kits and more. The samples will come supplied in a bag with a data label.

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Crinoid Stems – Morocco £4.00 – £10.00 ex VAT
• Geological Age: Silurian period, 443 to 416 millions years old
• Location: Djebel Issoumour, Alnif, Morocco
• Family: Echinoderm
• Species: Crinoid

Crinoid stem fossils collected from Djebel Issoumour, Alnif, Morocco. These fossil specimens from the Silurian period, exhibit the segmented nature of crinoid stems, varying between 30 to 60 mm in length and 10 mm in diameter, the samples are supplied in optional weights, making them perfect where a certain amount is needed for an economical costs, such as for schools, kits and more. The samples will come supplied in a bag with a data label.

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Crinoidal Limestone – Derbyshire £2.25 – £6.00 ex VAT
Specimens of Crinoidal Limestone, collected from Derbyshire in the UK. Limestone is a common, well known sedimentary rock. It consists of the calcium-rich shells, bones, and skeletons of the fauna that dominated during that period. It was laid down approximately 350 million years ago in semi tropical seas and comes from the Dinantian epoch of the Lower Carboniferous. This limestone in particular contains crinoids which are a group of ancient marine invertebrates, and part of the sea lily family. Specimens are available in various sizes and come supplied in a white card tray with information label.

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

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288 in stock
Crinoidal Limestone – Morocco £2.25 – £6.00 ex VAT
A small hand sample of fossil limestone containing numerous small Scyphocrinites crinoid stem fragments. Crinoids are fossilised sea lilies, these particular sample come from South Morocco. Often the stems are only preserved in fragments as can be seen. Samples measure approx in 3″ size and come in a small card tray with a label.

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300 in stock
Crinoidal Limestone (1kg) £8.00 ex VAT
Lower Carboniferous crinoidal limestone from Derbyshire, U.K. Supplie dby weight in lots of 1 kg. Comes in a polythene bag with an information label.

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Crinoidal Limestone Slide £18.00 ex VAT
Crinoidal Limestone thin section slide exhibiting a cross sectional view of crinoid stems and ossicles held within a calcite cement. Excellent to observe the nature of the minerals and interpret the history of the rock. The 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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12 in stock
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Crocoite £7.00 – £15.00 ex VAT

TOXIC SUBSTANCE!

Crocoite mineral specimens, composed of long single crystal clusters on a matrix, vibrant orange in colour, found in the famous Adelaide mine, Dundas, Tasmania, Australia, these are high quality, excellent specimens and are available in various sizes, supplied in a mag box or card tray with an information label. Due to the toxicity of this mineral, it will also come in a grip seal polythene bag.

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Out of stock
Danburite Crystals £6.00 ex VAT
Danburite crystals, collected from Mexico. This mineral belongs to the silicate family and is primarily composed of calcium, boron, and oxygen. Its name is derived from its original discovery locality in Danbury, Connecticut, USA. What sets danburite apart is its crystalline structure, which often forms prismatic, elongated, and well-defined crystals. These crystals can exhibit a range of colours, including colourless, pale pink, yellow, and occasionally light brown. These crystals are clear to pale pink in colour. These specimens measure between 2.5 – 4cm in length, and come in a polythene bag with information label.

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6 in stock
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Deltaic Sandstone Slide £18.00 ex VAT
Estuarine sandstone thin section slide exhibiting a range of features characteristic of this diverse and complex depositional setting. The thin section supplements the hand specimens nicely and offers an opportunity to interpret the complex transportation and depositional process of this sediment, perfect for educational use.

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4 in stock
Deltaic Sandstone £2.25 – £6.00 ex VAT
Specimens of Estuarine Sandstone, collected from Lancashire. Sandstone is a common, well known sedimentary rock, primarily composed of quartz grains. Estuarine sandstone as the name implies was laid down as fine cross bedded deposits at the mouths of rivers. Occasional marine incursions are evident from fossils & ripple bedding. Some of the fine beds are peppered with mica flakes. Specimens are supplied in a white card tray with information label.

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

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Deltaic Sandstone (1kg) £8.00 ex VAT
A fine grained sandstone formed in estuarine (river mouth) conditions, composed of fine quartz and mica. Available by weight in 1 kilo bags with an information label.

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Dictyonema (Norway) £1.00 ex VAT
Study grade specimens of Dictyonema Graptolites showing well preserved stipes. Size of pieces will vary.

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Didymograptus £2.00 ex VAT
Good quality fossil specimens of Didymograptus graptolite. These fossil specimens are found in Shale and the ‘tuning fork’ shape can be clearly seen, making them ideal to add to your fossil collection, or for high quality study and teaching use. Specimens are supplied in various sizes and come in a small card tray with an information label.

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Dinosaur Bone – UK £8.00 – £20.00 ex VAT
Specimens of Dinosaur Bone, collected from Abingdon, Oxfordshire in the UK. These samples are from an unidentified species, however they date to approximately 157 – 152 Ma. This puts these samples in the Kimmeridgian stage of the Jurassic period, which is the apex of the dinosaur’s rule on Earth. The specimens display a rusty brown colouration and showcase their porous bone structure. The pieces are from undetermined body parts and could be remnants from various parts of the animal. These samples are available in various sizes and come supplied in a white card tray with an information label.

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Diorite £2.25 – £6.00 ex VAT
Diorite rock specimens from Cockermouth, Cumbria, is an intrusive igneous rock from the Ordovician period with a coarse, phaneratic texture composed of plagioclase feldspar, biotite mica as well as hornblende with intermediate chemistry. Found with the Skiddaw group, the rock samples are more suited for serious collectors and higher level education to describe the chemistry and mineralogy of various igneous groups. Available in 3 sizes and supplied in a card tray with an information label.

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

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73 in stock
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Diorite Slide £18.00 ex VAT
Diorite thin section slide. Diorite is a grey to dark-grey intermediate intrusive igneous rock composed principally of plagioclase feldspar (typically andesine), biotite mica, hornblende, and/or pyroxene. This particular material was collected in Cumbria.

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
Dogtooth Calcite – Morocco £2.07 – £3.31 ex VAT
2" x 2"3" x 2"
Dogtooth calcite mineral specimens collected from Jebel Saghro, Morocco. Dogtooth calcite is found in open spaces such as limestone caves, geodes and veins, that consists of large calcite crystals thought to resemble dogs’ teeth due to the ‘pointed’ crystal habit they form in.

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Dogtooth Calcite and Selenite £2.27 – £4.85 ex VAT
Dogtooth calcite and selenite crystals in limestone matrix, these mineral specimens appear to have formed in pockets in limestone, likely by action by water creating hollows, leaving transparent, glass like crystals behind. Collected from Jebel Saghro, Morocco, the samples are available in various sizes and come supplied in a card tray with a label.

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Dolerite Slide £18.00 ex VAT
Dolerite microscope thin section ideal for educational use. Dolerite is a medium grained, mafic igneous rock typically containing plagioclase feldspar, augite (pyroxene) and olivine. It is typically found in igneous structures such as dykes and sills. These specimens were obtained from the Isle of Skye, Scotland. 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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5 in stock
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Dolomite £2.25 – £3.50 ex VAT
Dolostone or dolomite rock is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg(CO3)2. Most dolostones formed as a magnesium replacement of limestone or lime mud prior to lithification. It is resistant to erosion & less soluble than limestone in weakly acidic groundwater. Technically, dolostone has a stoichiometric ratio (reaction & product ratio) of nearly equal amounts of magnesium and calcium. This particular example comes from the Clitheroe area of Lancashire. Specimens are supplied in labelled card trays.

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Out of stock
Dolomite – Brown (1kg) £10.00 ex VAT
1 kilo of brown Dolomite mineral specimens from Cumbria, UK. The crystals are often a rhombohedral shape and are on crystal beds which are a pale brown colour. Dolomite is an important sedimentary and metamorphic mineral, found in dolostones and metadolostones, and as an important mineral in limestones and marbles where calcite is the major mineral present. These samples are supplied by weight in lots of 1 kilo and come supplied in polythene bag with an information card, suitable for large quantities with an economical price.

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16 in stock
Dolomite (Brown) £2.15 – £6.50 ex VAT
Brown dolomite mineral specimens exhibit curved face dolomite crystals on massive dolomite matrix collected from Cumbria, the colouration is due to hematite staining from nearby former iron mine workings. High quality mineral specimens from the UK available in various sizes.

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Dolomite (Pink) £1.84 – £5.29 ex VAT
Dolomite crystal beds, pink in colour form Morocco, the presence of manganese results in a pale pink hue, these mineral specimens also have larger crystals than the UK material and are higher quality. Available in various optional sizes, supplied in tray with a data label.

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50 in stock
Dolomite (White) £2.25 – £6.00 ex VAT
White dolomite crystal beds from the Pallieres Mine, Languedoc in France, the mineral specimens exhibit bright white dolomite crystals exhibting curved crystal faces and habit on a dark grey matrix with excellent contrast of colours. available in optional sizes, supplied in a tray with a data label.

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Dolomitic Limestone slide £18.00 ex VAT
Dolomite microscope slide with extreme birefringence in XPL and varied relief in PPL. Excellent to observe the nature of the minerals and interpret the history of the rock. The 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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6 in stock
Dragons Egg £3.36 ex VAT
Dragons eggs, made from rose quartz or amethyst, optional. Both minerals come from Brazil. Samples are between 2.5 cm to 4 cm in size and are supplied in a polythene bag.

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Dumortierite £1.15 – £2.07 ex VAT
Specimens of dumortierite from Brazil. These samples show dumortierite permeating a quartz matrix and are supplied in a white card tray with an information label.

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Dunite £2.25 – £6.00 ex VAT
Dunite igneous rock specimens from the Gusdal olivine pit in Åheim, southern Norway. Composed of green olivine minerals with chromite and pyroxene crystals, the rock forms as intrusive igneous plutons in the earth mantle down to 400 km deep and displays a coarse texture and green colouration. Overall, the samples are fairly granular and weak due to their chemistry and form part of the basal gneiss complex of southern Norway. Ideal for various levels of collectors and for higher level education and research use, the samples are available in three sizes and come supplied in a card tray with an information label.

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

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Dunite Peridotite Slide £18.00 ex VAT
Dunite Peridotite thin section microscope slide. In XPL view these thin sections exhibit the bright and beautiful second order interference colours of olivine. The high relief, lack of cleavage and distinctive fracturing is clearly evident in PPL view making for a very attractive thin section.

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9 in stock

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