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zircon crystals from Brazil, excellent mineral specimens with tetragonal form, vitreous lustre and a rusty brown colour, these samples also fluoresce under shortwave ultra violet light to vibrant yellow colour, roughly 1 cm in size and supplied in a packet with a data label.
Out of stock
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Zircon crystals showing partial tetragonal crystal habits from Brazil, they exhibit a vitreous lustre and have a brown colouration. Zircon is a common accessory mineral found at the earths crust, generally in igneous and metamorphic rocks or as minute grains within sedimentary rocks. It is a mineral which is very resistant to heat and erosion leading to its common occurrence on the earths surface.Although it can be found in many colours, with gem quality specimens being translucent, these particular specimens are a brown colour yet still have a vitreous lustre to them, making them glean in the light. The mineral has many uses in industry, including the casting of nuclear fuel rods, fuel converters and of course in jewellery (zirconia). These particular specimens from Brazil also have fluorescent properties, when exposed to shortwave UV light, they fluoresce a vivid yellow colour. Making these mineral samples suitable for educational use and for collectors, they range in size between 1 to 2 cm and will come supplied in a polythene bag with an information label.
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Andradite garnet crystals with nepheline mineral specimens, collected from Khenifra Province,Tafilalet, Morocco. This rare species of garnet, which is melanite, belongs to the schorlomite group, the contrast between the two black and white minerals makes for an interesing piece to observe. This variant of garnet is rare, and has become a popular gemstone lately, they are jet black with a vitreous lustre and easily identifiable crystal form. Available in a variety of sizes, samples will come supplied in a card tray with a data label.
70 in stock
Rhodolite garnets in quartz and mica schist matrix from Southern Norway exhibiting bright vibrant pink coloured garnets in a white quartz and metallic grey mica schist with a start contrast of colours, these minerals specimens are available in 3 sizes and come supplied in a card tray with a label.
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.
184 in stock
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.
18 in stock
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.
Pyrite on Rhaetic Bone Bed collected from Westbury-on-Severn, Gloucestershire. Of our specimens it is the pyrite crystal bed which is the key feature, some specimens may exhibit bones or scales but naturally this is no guarantee
9 in stock
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.
Baryte (also spelt barite) is a widely occurring mineral consisting of barium sulphate, they can occur with many crystal habits, in this case, these mineral specimens exhibit the cockscomb mass form, in which randomly orientated blades of the mineral occur on a massive bed. These particular specimens are a pink or orange colour with a pink bed but other colours of baryte exists, including white, buff or brown. Any barite specimen is incredibly dense, with small pieces even feeling heavier than they appear, which is surprising, considering it is a non metallic mineral. This density was how the mineral obtained its name, being derived from the Greek word ‘βάρυζ’ meaning heavy. It occurs in a range of environments and deposited via many processes including biogenic, hydrothermal and evaporation, among others. Commonly occurring in lead-zinc veins hence some of the samples contain galena (lead sulphide) as well. Over 75% of baryte extracted worldwide is used for weighting driling fluids in oil and gas exploration to control high formation pressures and prevent blowouts. These mineral specimens were mined in Mibladen, Morocco, they are available in various sizes, each specimen is supplied in a labelled card tray.
Baryte mineral specimens, unusual samples collected from Foss mine in Scotland, they have a fine crystalline texture instead and are quite robust specimens. Pieces are off white in colour and may show a shimmer effect in certain lighting conditions. Available in various sizes, supplied in a card tray with an information label.
29 in stock
Sulphur mineral specimens (also spelt sulfur) from Bolivia, these fine crystalline masses give off a pungent odour as expected of this mineral and have a pale yellow colouration to them. They formed in volcanic zones and are excellent for the more serious collector. Available in one size only and supplied in a card tray with a data label.
13 in stock
Blue lace agate mineral specimens of moderate size which clearly exhibit alternating bands of blue and white, the specimens come from Botswana and are excellent grade with minimal matrix on them. Formed through volcanic processes and the deposition of silica compounds in igneous rocks, these minerals are both important educationally and calming to look at.
Out of stock
Specimens of white coloured Plagioclase Feldspar also known as a Albite-Anorthite Series mineral. The specimens come from Osedalen, Southern Norway and are supplied in a 2″x2″ 3″x2″ 4″x3″ card tray with an information label.
These particular samples are a milky white to pale yellow colour and show typical fibrous crystal habit expected from Witherite. Samples are supplied in a white card with an information label.
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