D - K Archives - Geology Superstore

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
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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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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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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Epidote – Iran
Specimens of epidote crystal in matrix from Iran, excellent quality mineral specimens detailing the black, opaque colouration of epidote along with the vitreous lustre and prismatic crystal habit. The crystals are randomly orientated and form small beds upon a larger matrix.

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Epidote – Madagascar £2.07 – £11.50 ex VAT
Epidote crystal specimens with radiating sheath formation.the crystal habit of these mineral specimens from Madagascar are exhibited in excellent detail, with a vitreous lustre, green and black colour, supplied in a white card tray with a label.

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Epidote – Norway £2.25 – £6.00 ex VAT
Epidote mineral specimens available in various sizes from Arendal, Norway. These samples are of a massive variety of epidoite, where the crystals are to minute to be seen, they are dense, green in colour and have no other minerals with them. Available in 3 sizes and supplied in a tray with a data label.

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Epidote – USA £1.50 – £2.25 ex VAT
Specimens of Epidote from Michigan, USA. In particular, they have been collected from the Laurium Mine, Osceola, Houghton County. Epidote is an abundant rock forming mineral that is most commonly green in colour. These specimens date from the Stenian period, approximetely 1 – 1.2 billion years ago. These specimens are available in limited supply, with two different size options. They come supplied in a white card tray with information label.

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Erythrite £6.75 – £19.95 ex VAT

Erythrite mineral specimens from Bou Azzer, Morocco exhibiting an eye catching crimson pink colour on a grey rock matrix, some times known as red cobalt, it has been associated with cobalt and silver deposits. This mineral is becoming exceedingly rare to obtain now days, each specimen will come supplied in a card tray with a data label.

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Feldspar and Talc – Norway £2.25 – £6.00 ex VAT
Plagioclase Feldspar and Talc specimen from Otta in Southern Norway. Feldspar is the most abundant mineral in Earth’s crust, comprising over 40% of the total estimated mass. This variety, Plagioclase is the Sodium/Calcium rich variety of Feldspar, providing a pale pink colour. Talc is another abundant mineral, notably it is the index mineral for number 1 on Moh’s hardness scale – which means it is one of the least scratch resistance minerals on Earth; it is extremely friable and can leave a smooth, dusty trail on your hands once touched – this is not dangerous and is actually good for your skin! This specimen is perfect for laboratory or classroom analysis, as it shows the symbiosis of 2 abundant and siginificant silicate minerals in one specimen. Also ideal for a collection revolving round Norwegian minerals or silicates. Each specimen is provided with a white card tray and information label.

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Fluorescent Fluorite £20.00 ex VAT
Specimens of Fluorescent Fluorite collected from Weardale, Co. Durham in the UK. Fluorite (also known as fluorspar) crystal beds from the famous British locality, Weardale in County Durham, UK. It is a popular mineral specimen for many, children, teachers, collectors etc, it often forms with a cubic crystal habit with the crystals being a variety of colours and sizes from deep rich purples, vibrant greens, calming yellows and sometimes crystal clear. These particular samples of fluorite crystals on matrix are vary with any of the mentioned colours. They also display excellent fluorescence, with the crystals turning bright purple – lilac under a UV light. Specimens measure between 3 – 5 inches and come in a white card tray with information label.

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29 in stock
Fluorite – Morocco £4.00 – £10.00 ex VAT
Fluorite mineral specimens found in Morocco, a common mineral, used in various manufacturing process today. Exhibiting various colours, ranging from hues of green, purple and clear. The samples are massive crystalline with cubic crystals present as well. Available in two sizes, supplied in a card tray with a label.

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Fluorite – Weardale £2.00 – £8.00 ex VAT
Fluorite crystal beds on a matrix from the famous Weardale locality in County Durham, UK, specimens exhibit a range of colours from rich greens, to deep purples, calming yellows and crystal clear samples, available in a variety of sizes. These mineral specimens are ideal for collectors, children and educational use, supplied in a card tray with a data label.

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Fluorite (Massive) – Finland £2.25 – £3.50 ex VAT
Fluorite, also known as fluorspar, is a captivating mineral that commonly forms in hydrothermal veins, often associated with various other minerals such as quartz, calcite, and sphalerite. Fluorite exhibits a remarkable range of colours, including purple, green, blue, yellow, and even colourless varieties. This diversity arises from the presence of trace elements and exposure to various environmental conditions during its formation. Whilst fluorite crystallises in the cubic system, these specimens are of a ‘massive’ nature. They are from Finland and come supplied in a white card tray with information label. Available in two colours: Green and Purple, and two sizes.

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Fluorite Beds – Derbyshire £2.25 – £6.00 ex VAT
2" x 2"3" x 2"4" x 3"
Fluorite (also known as fluorspar) crystal beds with galena collected from Ashover, Derbyshire. Fluorite is a popular mineral specimen for many, children, teachers, collectors etc, it often forms with a cubic crystal habit with the crystals being a variety of colours and sizes from deep rich purples, vibrant greens, calming yellows and sometimes crystal clear. These particular fluorite crystals on matrix vary with any of the mentioned colours above. Some specimens exhibit well developed galena crystals along with the fluorite however it can be less obvious in others. We supply 2″ x 2″, 3″ x 2″ and 4″ x 3″ specimens; each in a card tray with an information label.

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Fluorite Group – Coldstones £1.50 – £5.00 ex VAT
Specimens of fluorite groups from Coldstones Quarry, Harrogate, North Yorkshire, UK. These specimens are clear in colour but are somewhat translucent due to mineral impurities. These pieces are supplied in a white card tray with an information label.

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Fluorite Octahedron – China £1.50 – £2.50 ex VAT
Fluorite octahedrons, these crystals specimens display in excellent quality another variation of the minerals, fluorites crystal habits, the octahedron. The crystals each have exactly 8 faces, hence the octahedron name. During formation, if the crystals have four perfect cleavage planes, octahedral shapes are produced. These particular samples come from China, each one is slightly translucent, letting though partial light and they all vary slightly in colour through various shades of green, purple and clear. It is important to note that these crystals, are genuine fluorite, they have been broken down, using the minerals own habit into the octahedron form. We offer them in two sizes small and large with each coming in a polythene bag with a label.

Small: Approximately 1 – 1.5cm

Large: 2+ cm

All measurements taken at the widest points

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Fluorite Octahedron – Illinois £1.50 – £2.50 ex VAT
Fluorite octahedron crystals of varying colours from Illinois, USA. These individual crystals are available in various sizes and have been cleaved into these octahedron shapes which is done due to the fluorite minerals points of cleavage which allows it to ‘break’ in four directions. Despite this, they still exhibit, excellent, almost gem quality clarity with very minor inclusions. Such crystals from Illinois are now difficult to come by these days as the fluorspar mines in the areas have long since ceased operations, causing supply of crystals to be exhausted. The crystals are available in various colours, chosen at random. Available in three different sizes, they come supplied in a white card tray with information label.

Small: Approximately 1cm in length

Large: Approximately 2cm in length

All measurements taken at the widest points

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6 in stock
Fuchsite in Quartz £1.50 ex VAT
Specimens of Fuchsite in Quartz, collected from Norway. These specimens are small, available in a 1.5″ x 1.5″ size, and come in a white card tray with an information label.

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Fulgurite (Lightning Stone) £1.20 ex VAT
Fulgerite mineral specimens from Algeria, formed from lightening strikes which pieces the desert sands instantly melting and fusing the quartz crystals creating a light weight hollow piece of rock.

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Galena – Ladywash Mine £3.50 – £13.00 ex VAT
Specimens of Galena with a high level of purity, collectd from Ladywash Mine, Eyam, Derbyshire, UK. Galena is a very important mineral, being the primary ore of lead. It is very dense and specimens exhibit metallic (shiny) lustre. These specimens are available in multiple sizes and come in a white card tray with an information label.

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Galena and Strontianite – Scotland £1.38 – £3.38 ex VAT
Galena and Strontianite – a lead or and strontium carbonate respectively – are present in this matrix from Orkney, Scotland, UK. The metallic blue veins of the galena can be seen running throughout these specimens, which are available in a number of sizes and provided with a white card tray and information label.

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Out of stock
Galena with Baryte £1.50 – £2.25 ex VAT
Galena with massive baryte from Morocco, showing the two contrasting colours of the off white baryte and metallic blue galena mineral specimens together, both are quite dense yet extremely fragile, these samples were collected from Morocco and available in 3 sizes.

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Garnets – India £1.50 ex VAT
Specimens of small almandine garnets found in India. These specimens are supplied in a small white card tray with an information label. The specimens are approximately 1″ – 1.5″ cm in diameter though this will vary slightly.

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18 in stock
Garnets in Biotite £2.25 – £6.00 ex VAT
Specimens of Garnets in Biotite, collected from Agder, Norway. The garnets in these pieces are almandine garnets, which are the most popular and common variety. These specimens exhibit deep red garnet crystals within a matrix of black biotite mica. They are available in multiple sizes and come in a white card tray with an information label.

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Goethite £1.65 – £2.75 ex VAT
Goethite mineral specimens from Morocco, the samples exhibit a black colouration with a high metallic lustre and a botryoidal formation, which makes the surface of the specimens appear ‘bubbly’. Excellent quality pieces with text book features suitable for collectors and schools, supplied in a card tray with a label.

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150 in stock
Goethite on Quartz £1.50 – £2.00 ex VAT
Beautiful acicular geothite crystals on fragments on Quartz, collected from Amerzgane, Ouarzazate, Morocco. These black needle like goethite crystals are of excellent quality and contrast beautifully against the lustrous white or smokey quartz. The opposing colours make these specimens all the more interesting to observe and the geode acts as natural protection for the fragile goethite crystals. Available in various sizes and supplied in a card tray with a label.

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120 in stock
Graphite £3.00 – £12.00 ex VAT
Graphite mineral specimens from China, well known in the modern day as the ‘lead’ in pencils due to its non toxic chemical composition, these samples of graphite are soft, exhibit a metallic lustre, dull grey colouration and waxy/greasy texture. Available in various sizes they come in card trays with a label.

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Graphite – Cumbria £2.07 – £9.20 ex VAT
Graphite, a rare variety of the carbon mineral from Seathwaite a small hamlet in Borrowdale, Cumbria, UK where the material was once mined. Samples are supplied in a small range of sizes with each piece supplied in a small card tray with an information label.

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Green Aventurine £2.07 – £5.54 ex VAT
Green aventurine mineral specimens from Brazil bearing a vibrant chrome green colour and crystalline texture expected of quartz minerals, the presence of platy minerals also gives them a glittering effect when viewed in light. These specimens are excellent additions to collections or as teaching aids, supplied in a card tray with a data label.

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Grossular Garnets £0.35 ex VAT
Single specimens of grossular garnets found in India. Specimens are supplied in a small polythene bag and come with a information label.

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Gypsum – Daisy Bed (UK) £4.60 – £35.00 ex VAT
Daisy bed gypsum mineral specimens found in Kirkby Thore, Cumbria, UK detailing a beautiful flower like radiant crystal habit, hence the name. Specimens are supplied in a white card tray and come with a information label.

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Out of stock
Gypsum – Desert Rose £1.15 – £2.07 ex VAT
Desert rose mineral specimens composed from gypsum found in Tunisia, the samples are composed of numerous crystals which resemble ‘petals’ which are randomly orientated, thus giving them a rose flower effect. Specimens are supplied in a 1.5″ x 1.5″ card tray or as approximately 1 cm diameter pieces in 1″ magnifier boxes with an information label.

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Gypsum – Satin Spar £2.25 – £6.00 ex VAT
Gypsum satin spar mineral specimens from Morocco, which are a pearly white colour composed of high quality fibrous crystals which are long and orientated in the same direction giving the samples a silky lustre. These pieces are available in various optional sizes, supplied in a card tray with a label.

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432 in stock
Gypsum Orange Satin Spar – Morocco £1.56 – £2.69 ex VAT
gypsum satin spar with an orange colouration, found in Morocco, these mineral specimens exhibit excellent fibrous texture and a silky lustre, along with the unusual orange colour, makes these particular samples very sought after simply just for their unique appearance. Available in 2″ x 2″ size pieces only and supplied in a card tray with a label.

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Halite £1.00 – £3.25 ex VAT
Halite mineral specimens from the Boulby mine in Redcar, North Yorkshire, UK. Halite is a salt mineral and has a cubic crystal system and vitreous lustre, these specimens are rough and available in various sizes, suitable for educational use, supplied in a card tray with a label.

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30 in stock
Halite Crystal £2.50 – £4.00 ex VAT
Specimens of Halite Crystals, collected from Boulby Mine in Redcar, North Yorkshire, UK. Halite (rock salt) is a sodium mineral specimen and variety of salt. It features a cubic crystal habit and vitreous lustre. These specimens are available in two different sizes and colours. Specimens come in a white card tray with an information label.

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Hematite – UK £4.00 – £6.00 ex VAT
Hematite mineral specimens from Cumbria in the UK, showing partial botryoidal crystal habit and some fibrous habit. Despite this, the samples are text book examples, and exhibit a dense weight, deep red colouration and streak and a dull metallic lustre. Specimens are available in various sizes and come in a card tray with a label.

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60 in stock
Hemimorphite – Scotland £1.00 – £1.60 ex VAT
Hemimorphite mineral specimens found near Dunfries, Scotland, often located above zinc and lead mines near sphalerite and galena, these particular samples are a muted blue and green colour on matrix. Available in two sizes and supplied in a specimen tray with a label, they will make an excellent addition to serious British mineral collectors.

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38 in stock
Honey Calcite £2.25 – £6.00 ex VAT
Specimens of Honey Calcite, collected from Mexico. This is a variation of the mineral calcite which exhibits a translucent yellow orange colour and crystalline habit. Calcite is a relatively soft mineral, measuring a 3 on Mohs scale of hardness. Specimens are available in multiple sizes and comes in a white card tray with an information label.

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Ironstone – USA £2.00 – £30.00 ex VAT
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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Jasper £2.07 – £5.54 ex VAT
Jasper mineral specimens from South Africa, jasper is a variation of quartz, it is opaque and can be found in various colours, but shades of red are the most common due to the presence of iron impurities. These samples are available in various sizes and come in a card tray with a label.

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Kämmererite – Norway £5.00 – £12.00 ex VAT
Specimens of Kämmererite, collected from Aheim, Western Norway. Kämmererite is a variety of Chromite. As such, its colour varies between dull grey and shimmering silver depending on the abundance of chrome. Specimens are available in multiple sizes and come in a white card tray with an information label.

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Kammererite with Olivine £2.30 – £3.68 ex VAT
Kämmererite mineral specimens over Olivine, collected from Aheim, Western Norway. Supplied in a card tray with an information label.

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14 in stock
Kunzite (50g) £10.00 ex VAT
Specimens of Kunzite, collected from Sar-i Sang, Afghanistan. Kunzite is a variety of spodumene, a pyroxene mineral and important source of lithium. These kunzite crystals range from clear to pale pink in colour, which is attributable to trace quantities of manganese. These crystals are small, each measuring up to only a couple of centimetres maximum. They come in lots of 50 grams, in a polythene bag with an information label.

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Kyanite – Black £6.90 ex VAT
Kyanite with a black colouration, a rare and unusual variety from Minas Gerais, Brazil, they exhibit excellent high quality radiating sheaths of accicular crystals, starting of from a single point and radiating out into many crystal and becoming wider. The mineral specimens are 3 inches in length with widths and thickness varying from sample to sample, all come supplied in a card tray with a label.

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16 in stock
Kyanite – Brazil £4.20 – £40.00 ex VAT
High quality kyanite mineral specimens exhibiting a rich blue colour and long, bladed crystals. These samples come from Minas Gerais in Brazil, they may also contain quartz as well, indicating a pegmatite origin. Specimens are available in various sizes and come in a card tray with an information label.

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16 in stock
Kyanite in Fuchsite – Tanzania £2.25 – £5.00 ex VAT
Specimens of Kyanite in Fuchsite, collected from Mundarara Mine, Arusha Region in Tanzania. Kyanite is a distinct silicate mineral with a rich blue colour. Its prescence often indicates a high pressure metamorphic environment. Despite the kyanite in these fuchsite specimens being of a low grade, the distinct blue colour is still visible. These specimens are available in multiple sizes and come in a white card tray with an information label.

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