ROCKS - Geology Superstore

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Ashford Black Marble – Derbyshire £2.25 – £6.00 ex VAT
Size
2" x 2"3" x 2"4" x 3"
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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Brockram Breccia – Cumbria £2.25 – £6.00 ex VAT
Size
2" x 2"3" x 2"4" x 3"

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Eclogite – Germany £2.00 – £25.00 ex VAT
Size
1.5" x 1.5"2" x 2"3" x 2"4" x 3"
German Eclogite specimens from Weissenstein, Bavaria. Eclogite is a metamorphic rock, featuring red garnets within a matrix of sodium rich plagioclase called omphacite. These samples are perfect for both collectors and for educational use. They come supplied in a white card tray with an information label. Limited stock available.

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Granodiorite – Cumbria £2.25 – £6.00 ex VAT
Size
2" x 2"3 x 2"4" x 3"
Granodiorite specimens from Cumbria, UK. These rocks originate from the Ordovician era, dating back roughly 443 to 448 million years. This Granodiorite, derived from Eskdale granite outcrops, exhibit a coarse-grained texture and represents a blend of granite and diorite characteristics.. While sharing mineral components like quartz, feldspar, and mica with granites, its distinctiveness lies in the elevated levels of plagioclase and mafic minerals like biotite, hornblende, and augite. Notably, this specific Granodiorite variety boasts a significant biotite content. Available in three different sizes, these specimens come supplied in a white card tray with information label.

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Ironstone – USA £2.00 – £30.00 ex VAT
Size
1.5" x 1.5"2" x 2"3" x 2"Display Piece
Specimens of Ironstone that have been collected from Breitung Mine, Marquette County, Negaunee, Michigan, USA. These specimens are a deep reddish brown in colour with some specimens exhibiting clear banding. Please note that banding is not visible on all pieces. These specimens are available in very limited supply with three sizes to choose from. They come supplied in a white card tray with information label.

Additionally we also have one large display piece available, measuring approximately 18cm x 15cm at its widest points. This display specimen exhibits a distinct botryoidal texture on its top surface, making it an intriguing and appealing specimen to add to any collection.

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Orbicular Rhyolite – Peru £2.25 – £6.00 ex VAT
Size
2" x 2"3" x 2"4" x 3"
Specimens of Orbicular Rhyolite, also sometimes referred to as Leopardskin Jasper, obtained from Peru. The distinctive spots are formed by staining from iron and manganese hydroxides. These specimens are unique in design and polish up very well. They are available in a range of sizes and come supplied in a white card tray with information label.

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Rapakivi Granite – Finland £2.00 – £7.00 ex VAT
Size
1.5" x 1.5"2" x 2"3" x 2"4" x 3"
Specimens of Rapakivi Granite sourced from South Finland, which have undergone cutting and polishing. This particular rock belongs to the Granite family, and shares the typical characteristics of granite. Those being a coarse-grained, plutonic igneous rock, consisting of orthoclase feldspar, quartz, and biotite mica. Each piece comes packaged in a white card tray accompanied by an information label.

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Reef Limestone £2.25 – £6.00 ex VAT
Size
2" x 2"3" x 2"4" x 3"
Specimens of Reef Limestone, collected from Wren’s Nest, Dudley, UK. These specimens are Silurian in age, stemming from the Wenlock Series Limestone and are an example of a death assemblage. A death assemblage is when multiple different fossils, not typically associated with each other, are found together in the same rock. This occurs These reef limestone specimens display a range of fossils including corals, trilobites, broyzoan and brachiopods. These are great educational specimens, ideal for teaching about the geological processes that lead to the formation of death assemblages. These specimens are available in a range of sizes and come supplied in a white card tray with information label. Limited stock available.

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Accretionary Lapilli Tuff £1.73 – £3.68 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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.

67 in stock

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Aeolian Sandstone £1.73 – £3.68 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
A Triassic red millet seed sandstone of aeolian (wind blown) desert origin.

183 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.

83 in stock

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Amygdaloidal Basalt £1.73 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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.

69 in stock

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Andesite £1.48 – £2.65 ex VAT
Specimen Size
2" x 2"3" x 2"
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.

35 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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Anyolite – Tanzania £2.00 – £3.00 ex VAT
Specimen Size
1.5" Mag Box 1" Mag Box
Specimens of the rock anyolite comprised of the minerals zoisite, corundum var. ruby and pargasite from Mundarara Mine, Arusha Region, Tanzania. Specimens are supplied in a magnifier box and come with an information label.

Please note that the size of the ruby within the rock varies between specimens.

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Augen Gneiss £1.15 – £3.46 ex VAT
Specimen Size
2"x 2"3" x 2"4" x 3"
Augen Gneiss is a foliated metamorphic rock with large crystals of lenticular or eliptical shear bound microcline.

13 in stock

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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 £1.75 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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.

88 in stock

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Basalt £1.38 – £3.28 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
Basalt igneous rock specimens from Northern 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.

27 in stock

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Bauxite £2.01 – £5.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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.

287 in stock

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Biotite Gneiss – Norway £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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.

74 in stock

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Biotite Gneiss – Scotland £1.48 – £3.85 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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 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.

70 in stock

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Biotite Granite (polished) £1.20 – £6.00 ex VAT
Specimen Size
1.5" x 1.5"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.

2 in stock

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Biotite Muscovite Granite £1.73 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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.

77 in stock

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Boulder Clay £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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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Breccia (Calcrete) £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
This Breccia is a calcrete cemented scree deposit of Pleistocene age from the Manifold Valley in Staffordshire.

40 in stock

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Breccia (recent) £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
Recent Breccia from the Holoceneperiod, found in Yorkshire supplied in 2″ X 2″, 3″x2, 4″x3″ card trays with labels.

40 in stock

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Bunter Sandstone (Sherwood Sandstone) £2.25 – £6.00 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
Specimens of bunter sandstone from Knutsford, Cheshire, UK. This bunter sandstone is a desert sandstone from the Buntsandstein (bunter sandstone) strata. Samples are supplied in a white card tray with an information label and are ideal for collectors of British rocks.

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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.

196 in stock

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Cannel Coal £1.73 – £3.68 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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.

200 in stock

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Cannonball Limestone £2.50 ex VAT
This is a rare & unusual rock, part of the highly studied Zechstein Formation. It is a concretionary Magnesium Limestone of Permian age, supplied in a 1.5″ x 1.5″ magnification box.

13 in stock

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Carstone (Carrstone) £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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.

50 in stock

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Chalk £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
Chalk is a fine, porous, white form of limestone of Cretaceous age. Formed from the accumulation of coccoliths in a relatively deep marine environment.

284 in stock

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Chalk (Red) £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
Red chalk is early Cretaceous in age. It is chemically very similar to the later & better known white chalk.

70 in stock

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Chert
Carboniferous Chert found in Lancashire supplied in a card tray with label.

Out of stock

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Chert – Foss Mine £1.95 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
Specimens of chert found in Foss mine, Scotland, UK. Specimens are supplied in a white card tray with an information label.

15 in stock

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Chiastolite Slate £1.73 – £3.68 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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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Coal – Anthracite £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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.

200 in stock

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Coal (Bituminous) £1.38 – £2.62 ex VAT
Specimen Size
2" x 2"3" x 2"
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.

23 in stock

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Conglomerate – Farringdon £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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.

200 in stock

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Connemara Marble £1.10 ex VAT
Specimen Size
1.5 " x 1.5"
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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Coral Limestone £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
Carboniferous coral limestone from Anglesey, North Wales. Composed largely of well preserved Lithostrotion corals

50 in stock

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Cordierite Hornfels £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
This variation of Hornfels exhibits strong banding with small crystals of Cordierite.The samples were collected from near Carrock Fell. Cumbria, UK. .

37 in stock

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Cretaceous Sandstone £1.73 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
Cretaceous sandstone rock specimens from the Wealden group found in Philpots quarry, west Hoathly, Sussex. This sedimentary rock is formed in estuarine conditions and exhibits quartz and mica crystals, commonly used as a popular building stone.

48 in stock

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Crinoidal Limestone £1.73 – £3.68 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
Lower Carboniferous crinoidal limestone from Derbyshire, U.K.

296 in stock

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Crinoids Cluster Piece £1.38 – £3.46 ex VAT
Specimen Size
2" x 2"3" x 2"4" x 3"
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.

300 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.

50 in stock

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Dolomite £1.38 – £2.62 ex VAT
Specimen Size
2" x 2"3" x 2"
Dolomite or Dolostone is a carbonate rock composed primarily of the mineral Dolomite.

Out of stock

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Dunite £1.73 – £5.18 ex VAT