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PRODUCTS BY WEIGHT
BOX SETS
PLASTIC DISPLAY PRODUCTS
PRODUCTS BY WEIGHT
BOX SETS
PLASTIC DISPLAY PRODUCTS
£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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Phone: +1 (23) 456 789
Kyanite crystal sheaths from Minas Gerais, Brazil, which show excellent accicular crystal form. Kyanite is often found in hues of blue, this black variation is rare and unusual, making such specimens highly sought after. Kyanite is a silicate mineral which is often found in pegmatites or in sedimentary rocks. However, it also occurs in metamorphic rocks, where its presence is often an indication of high pressure. The name comes from the Greek word, kyanos, which means ‘dark blue’ a reference to the rich blue colour that it is usually found in. Even more interesting is that these mineral specimens from Madagascar appear to all show excellent radiating sheath forms, while most kyanite does, the tight, clean nature of these crystals is far higher in quality. The samples are approximately 3 inches in length with the width varying but all are quite thin, they come supplied in a card tray with an information label.
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Muscovite mica sheets from Iveland, Southern Norway, specimens depict the basal cleavage of this mineral excellently as well as it’s elasticity, sometimes being referred to as ‘books’ of mica sheets. These samples were collected by staff from Norway, they have a vitreous lustre and are available in various sizes, all pieces supplied in a card tray with an information label.
Muscovite mica sheets from Brazil, an excellent mineral specimen, especially for educational use as it depicts the basal cleavage perfectly, so thin are these sheet, that even when layered, they are still transparent. They have an off brown or pink hue and some impurities. Sizes vary as do shapes, each piece will come supplied loose with an information label.
12 in stock
Phyllite is a foliated metamorphic rock formed from slate which has been further metamorphosed. These specimens from Kinlochleven in Scotland and show good, fine cleavage and a silky metallic lustre.
We also supply Phyllite thin sections for microscope study which are available to buy HERE.
178 in stock
Kaolinite is a clay mineral specimen which is used extensively in industry, it is a soft, fragile mineral and is also known as China clay. Formed form the breakdown of feldspar minerals, these samples come from Cornwall, UK and is available in 2 sizes, supplied in a card tray with a label.
Out of stock
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.
16 in stock
Massive specular hematite from Brazil, black colouration and metallic lustre which gives the crystals a sparkling appearance. These particular specimens are of specularite crystals in a massive form, therefore the samples have a highly crystalline texture. They come from Brazil and give off a metallic shimmer when held under certain lighting. Available in various sizes and supplied in card tray with an information label.
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.
Moss Agate mineral specimens from India, deep green in colour due to the presence of chrome and iron mineral impurities, this chalcedony mineral breaks with a conchoidal fracture, has a glassy texture and can have sharp edges, caution is advised. Available in various sizes, this well known mineral has been used in the past as a gemstone as it takes a high polish, natural specimens, they will come supplied in a card tray with an information label.
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.
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.
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.
50 in stock
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.
Baryte mineral specimens collected form Somerset in the UK, exhibiting a bladed crystal habit or massive form, the dense specimens are an off white, yellow or brown colour due to staining from hematite (iron ore), available in various sizes, ideal for educational use.
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
Milky quartz mineral specimens from Norway, with a pale white colouration, hence the name, sometimes also known as white quartz, snow quartz or simply quartz. These particular samples were collected by staff from Iveland, Norway. This locality is also where we collected the smokey quartz from. It is in a massive form and has a very fine crystalline texture, this also results in it sometimes being sharp, so caution is advised when handling these samples. It is available in various sizes and supplied in a card tray with an information label.
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
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