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    Accretionary Lapilli Tuff

    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.

    69 in stock

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    Agglomerate £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"

    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.

    84 in stock

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    Amygdaloidal Basalt

    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.

    73 in stock

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    Amygdaloidal Basalt with Epidote

    Amygdaloidal basalt, showing instead, gas vesicles (bubbles) with epidote crystals as opposed to the usual quartz and calcites normally expected. Specimens come from the Isle of Skye and are available in various sizes, each rock will come in a card tray with an information label.

    Out of stock

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    Amygdaloidal Lava With Chlorite Amygdales (Trap Rock) – Germany

    Specimens of amygdaloidal lava with chlorite amygdales (trap rock) found in Idar-Oberstein, Germany. Specimens are supplied in a white card tray with a information label.

    27 in stock

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    Andesite

    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.

    53 in stock

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    Anorthosite £1.73 – £5.18 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    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.

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    Augite Andesite £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    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.

    100 in stock

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    Augite Granophyre

    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.

    89 in stock

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    Banded Tuff £2.62 ex VAT
    Specimen Size
    3" x 2"

    Banded tuff rock specimens from Cumbria, UK. An extrusive igneous rock with a felsic chemistry and rhyolitic texture, the specimen exhibit a pink colouration due to the presence of feldspar as well as banded formations. Available in various sizes and supplied in a card tray with a label.

    Out of stock

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    Basalt £1.38 ex VAT
    Specimen Size
    2" x 2"

    Basalt igneous rock specimens from, Ireland, which formed during the Tertiary period approximately 60 million years ago. A dense, fine crystalline, dark coloured rock which forms at extrusive igneous bodies and contains olivine alongside with various pyroxene minerals such as augite along with plagioclase as well. The samples are available in 3 sizes and come supplied in a white card specimen tray with a label. Being so common and an important igneous rock, it is suitable for educational use as they are one of the introductory and staple rocks that students are often shown when entering earth sciences.

    42 in stock

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    Basalt with Augite crystals

    These particular samples of basalt contain augite crystals and depending on which surface you look at on the samples you will be able to see the monoclinic prismatic structure of the augites which tend to be a very dark green or blue colour. The specimens come from Norway and are supplied in a white card tray with a label

    Out of stock

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    Biotite Granite £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    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.

    75 in stock

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    Biotite Granite (polished) £1.38 – £5.29 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    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.

    Out of stock

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    Biotite Muscovite Granite

    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.

    81 in stock

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    Bytownite Basalt £1.73 – £3.98 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Bytownite basalt is another variation of the common Basalt rock. These particular samples come from Cumbria and are available in a range of sizes.

    200 in stock

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    Diorite £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    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.

    58 in stock

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    Dunite £1.73 – £5.18 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    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.

    30 in stock

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    Essexite (olivine monzogabbro)

    Essexite igneous rock specimens from Lanarkshire, Scotland, UK, also known as olivine or nepheline monzogabbro is an intrusive rock with mafic chemistry, composed of nepheline and plagioclase feldspar along with olivine, magnetite minerals as well as augite phenocrysts which exhibit euhedral crystal forms. The rock has a dense weight and overall dark colouration but attractive appearance. It is locally known as Crawfordjohns and was highly sought after as a high quality material to produce curling stones. These samples are excellent for young and older collectors as well as higher educational use, the pieces are available in three sizes and come supplied in a card tray with an information label.

    64 in stock

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    Gabbro £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Gabbro igneous rock specimens from Balmedie quarry, Aberdeen, Scotland which exhibit a coars grained texture from the crystals. Formed as a mafic pluton intrusion, the samples contain pyroxenes such as augite along side plagioclase feldspar, amphibole and olivine crystals. They are derived from a body known as the Belhelvie basic intrusion which the parent unit being the Caledonian Supersuite. Samples exhibit a grey colouration and density and are suitable for the more serious or professional collector or higher educational use to differentiate similar looking igneous rocks with different compositions and origins. Available in three sizes, the specimens come supplied in a card tray with an information label.

    50 in stock

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    Gabbro Big Feldspar £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Hand size specimens of the big feldspar variant of gabbro, samples were collected from Carrock fell, Cumbria, UK and can be supplied in 3 sizes.

    76 in stock

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    Gabbro Troctolite £1.38 ex VAT

    A variation of gabbro, Troctolite consists of olivine and plagioclase along with small amounts of pyroxene. It is a coarsed grained rock and are supplied in a 2″ x 2″ white card tray.

    Out of stock

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    Gabbro with Tourmaline and Pyrite (Scotland) £1.38 – £6.90 ex VAT
    Specimen Size
    1.5" x 1.5"2" x 2"3" x 2"4" x 3"5" x 3.5"

    Specimens of gabbro containing tourmaline and pyrite from Belhelvie, Aberdeenshire, Scotland. These particular samples of gabbro contain small but visible amounts of tourmaline crystals and pyrite, some pieces may also show small amounts of epidote and actinolite. These specimens are available in multiple sizes and are supplied in a card tray with an information label.

    Out of stock

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    Garnet Peridotite £3.45 – £9.20 ex VAT
    Specimen Size
    1.5 " x 1.5"2" x 2"3" x 2"4" x 3"

    Garnet peridotite igneous rock specimens found in the Gusdal Olivine Pit, Åheim, Norway is an ultra mafic rock which contains high pressure and temperature minerals such as olivine and garnet crystals. Exhibiting a green colouraiton with striking red spots, these samples were pushed up to the earths crust during the Caledonian orogeny during the Ordovician and Devonian period over 400 million years ago. The specimens are dense as expected and are ideal for children and serious collectors because of the colourful appearance as well as for higher educational use to describe deep mantle material as well as orogenic processes. The hand samples are available in various sizes and come supplied in a card tray with an information label.

    199 in stock

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    Graphic Amazonite

    Graphic amazonite collected from Norway, composed of green feldspar and smokey quartz, a rare variation which appears to show the minerals as streaks. Samples are supplied in a 3″ x 2″ white card tray with an information label.

    Out of stock

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    Graphic Granite £1.44 – £3.85 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Graphic granite is an igneous pegmatite rock from Iveland, Norway, which forms in intrusive batholithic bodies that have a felsic composition. As such, the rock is mainly composed of quartz and orthoclase feldspar crystals and lacks any mica, making the rock leucocratic. These samples have what is known as a graphic texture, due to the formation of the crystals, which result in an appearance similar to that of cuneiform text which was once used by ancient human cultures. A brightly coloured, eye catching rock, the samples are suitable for collectors and educational use at higher levels and come available in three sizes. Each specimens is supplied in a card tray with an information label.

    96 in stock

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    Greisen £1.44 – £3.85 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Greisen metamorphic rock specimens from Caldbeck Fells, Cumbria, composed mainly of quartz and mica with an off yellow colouration. The rock is known as an endoskarn and forms when hydrothermal fluid and heat alter a granitic body, resulting a heavily altered rock which may contain trace amounts of rare elements. These samples are suitable for advanced collectors and higher level education and are available in three sizes, each pieces will come supplied in a card tray with a label.

    37 in stock

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    Grey Granite – Scotland £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Grey granite rock specimens from Scotland, featuring the main mineral components expected in granite such as quartz, feldspar and mica. The quartz is slightly smokey, giving the specimens an overall grey appearance. Available in 3 optional size.

    Out of stock

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    Ignimbrite Welded Tuff £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Ignimbirte welded tuff is a pyroclastic rock of any origin formed through volcanic processes, the rock appears to show streaks of welded material on some surfaces and appears to be rhyolitic on the inside. Specimens come from Cumbria and are available in various sizes.

    81 in stock

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    Microgranite – Cumbria £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Micro Granite is a variation of the granite group of rocks, composed of the minerals quartz, feldspar and mica. These particular samples were collected from Threlkeld quarry, Cumbria, UK. They are supplied in a small white tray with an information label.

    199 in stock

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    Microgranite – Wales £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Microgranite, exhibiting typical granite composition of quartz, feldspar and mica, however the crystals range from medium to fine grained, hence the name. Specimens come from Wales and are available in 3 optional sizes.

    Out of stock

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    Nepheline Syenite £2.07 – £5.75 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Specimens of nepheline syenite sourced from the Larvik municipality, Norway. These samples have a reddish brown to pale grey colouration and display crystals of aegirine. Specimens are available in multiple sizes and come supplied in a card tray with an information label.

    Out of stock

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    Obsidian £1.61 – £4.23 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

     

     

    Obsidian is an extrusive igneous rock, these specimens exhibit a typical black colouration with conchoidal fractures, they come from South East Mexico and are excellent for educational use and collectors due to the quality. This igneous rock forms when magma extrudes onto the earths surface, chemically it is silica rich and impurities give the black colouration. It’s fine crystalline texture and fracture makes obsidian appear glassy and it breaks as such. The pieces are available in various sizes and come supplied in a card tray with an information label.

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    Obsidian (Mahogany) £1.44 – £3.85 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

     

     

    Mahogany obsidian sourced from the United States of America. Impurities of magnesium and iron give this variety a red or brown appearance hence the name ‘mahogany obsidian’ or oak obsidian. Each Sample is supplied in a labelled card tray.

    Out of stock

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    Obsidian (Snowflake) £1.44 – £3.85 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Snowflake Obsidian found In Anatolia, Turkey is characterised by pale radially clustered crystals of Cristobalite set in an otherwise black vitreous matrix. Each sample is supplied in a labelled card tray.

    Out of stock

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    Olivine Dolerite £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Olivine dolerite igneous rock specimens from Clee Hill, Shropshire, UK, composed of pyroxene minerals such as augite and magnetite as well as plagioclase feldspar. The samples are fine grained and crystalline in texture with a dense weight  and black colouration. Similar in appearance to gabbro and basalt, the rock samples are suitable for serious collectors or higher level education to explain the difference in chemistry and mineralogy of igneous rocks. The samples are available in three sizes and supplied in a card tray with an information label.

    71 in stock

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    Pegmatite £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    This granite pegmatite contains large sheets of muscovite mica, orthoclase feldspar and quartz matrix. An excellent teaching material which comes from Southern Norway. Each specimen comes in a labelled card tray.

    Out of stock

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    Peridotite £1.73 – £5.18 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Peridotite, found in Finland, is a dense, coarse grained igneous rock. It is commonly used in saunas due to certain porpertie. These rock specimens are ideal teaching aids or collectors specimens. Supplied in a card tray with label, offered in 3 optional sizes.

    Out of stock

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    Phonolite – Madeira £1.73 – £4.60 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Phonite is an igneous rock with a coarse grain texture, these specimens are from Pico Ruivo, Madeira, Portugal and have a grey colour with fine crystalline form. An uncommon rock, samples are supplied in a white card tray and come with an information label.

    Out of stock

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    Phonolite – Scotland £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Phonolite igneous rock specimens, an intrusive crystalline version of nepheline syenite, this rock lies between felsic and mafic composition, collected from Traprain Law, Soctland,  the name of the rock is derived from the ancient Greek word which means ‘sounding stone’. Which alludes to the feature this rock has of emitting a metallic ringing when struck. Samples are available in various sizes and come supplied in a card tray with a label.

    70 in stock

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    Pink Granite £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Pink Granite, rich in potassium feldspars giving the distinctive pink hue, easily identifiable as a granite due to its mineral composition. Specimens come from Scotland and are supplied in a card tray with label.

    8 in stock

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    Pink Granite – China £2.62 ex VAT
    Specimen Size
    3" x 2"

    Pink granite rock specimens from China, containing the expected granite minerals, however, these specimens are higher in biotite mica, thus making the pieces seem darker than other pink granites.

    90 in stock

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    Pitchstone £1.15 – £3.45 ex VAT
    Specimen Size
    1.5" x 1.5"2" x 2"3" x 2"3" x 3"

    Pitchstone, a low grade variation of obsidian, often appearing a dull black or grey colour. These specimens come from Turkey and are available in various optional sizes.

    Out of stock

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    Preseli Bluestone – (Dolerite) £3.45 – £13.11 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    These specimens of ‘Preseli Bluestone’ are a form of Spotted Dolerite. The samples originate from the Preseli Hills of Wales, and were transported by a glacier & deposited as glacial erratics. Each specimen is supplied in a labelled card tray.

    76 in stock

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    Pumice

    Pumice specimens from the Lipari islands, Italy. Pumice is an igneous rock with a highly porous structure resulting from trapped gas bubbles as the lava was being ejected. The rock is usually very light & buoyant in water. Specimens are supplied in a card tray with label.

    64 in stock

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    Rhomb Porphyry £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    An igneous rock exhibiting a porphyritic texture containing large cubic crystals of feldspar within a fine grained matrix. Collected near Oslo, Norway. Each sample is supplied in a labelled card tray. Each sample is supplied in a labelled card tray.

    59 in stock

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    Rhyolite

    Rhyolite specimens found in Cumbria. Rhyolite is a felsic (silica rich) rock, often formed in highly explosive volcanoes. Specimens are supplied in a card tray with label.

    76 in stock

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    Rhyolite (Banded) £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Banded rhyolite from Glen Coe, Scotland showing laminar flow banding which was produced by the viscous lava which formed the rock, available in various sizes, these specimens are suitable for educational use to display flow banding. Supplied in a card tray with an information label.

    77 in stock

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    Rhyolite (Felsite) £1.38 – £2.62 ex VAT
    Specimen Size
    2" x 2"3" x 2"

    Rhyolite Felsite, a highly felsitic composed variation of Rhyolite, found in Fife, Scotland, an extrusive igneous rock composed of sodium, quartz and feldspar, thus often having a pale white to pink colouration. Available in various sizes and supplied in a card tray with an information label.

    35 in stock

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    Shap Granite £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Shap granite igneous rock specimens from Shap Fell, Cumbria, UK which exhibit typical coarse grained crystalline textures expected of intrusive felsic rocks, being composed of quartz, plagioclase and orthoclase feldspar and biotite mica. This popular granite is very sought after for a variety of applications and has a colourful appearance. It is believed to have formed during the early Devonian period as a plutonic intrusion in the area and is quarried extensively. Samples are ideal for collectors of all levels and ages as well as all educational levels as the minerals can be easily described with the origin and processes being suitable to teach higher level students. Samples are available in three sizes and come supplied in a card tray with an information label.

    19 in stock

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    Syenite – (Larvikite) £1.73 – £5.64 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Larvikite is an igneous plutonic rock and variant of monzonite from Larvik, Norway, due to its chemistry, it is composed mainly of orthoclase, albite and anorthite along with plagioclase which gives the rock a blue to silver shimmering effect. The igneous pluton formed during the Permian period, 292 – 298 million years ago during the the Variscan orogeny. A beautiful rock to observe due to its coarse crystalline texture and schiller effect, the samples are ideal for general interest, collectors and educational use with specimens being available in three sizes and come supplied in a card tray with an information label.

    150 in stock

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    Trachyte

    Trachyte, a common igneous rock composed of various minerals including quartz, feldpsars, micas and olivine, rock specimens come from East Lothian, Scotland and are available in optional sizes, supplied in a card tray with a label.

    20 in stock

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    Volcanic Scoria

    Volcanic scoria rock specimens from Italy with a deep red colouration and numerous vesicle displaying text book quality. Formed when basaltic or andesitic magma or lava reaches the earth surface, the escaping gases leave behind pockets which remain even after the lava has solidified. Samples are available in optional sizes and come in a card tray with a label.

    65 in stock

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    Volcanic Tuff £1.38 – £3.46 ex VAT
    Specimen Size
    2" x 2"3" x 2"4" x 3"

    Tuff from the Borrowdale Volcanic Group, Ordovician in age, the rock has a green colouration to it and a slate like cleavage, hence sometimes being known as volcanic slate, green slate or Borrowdale slate. Rock specimens are available in 3 optional sizes and will come supplied in a card tray with a label.

    74 in stock