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Specimens of topaz with bixbyite from Topaz mountain, Utah, USA. The bixbyite exhibits a black colour with metallic lustre, contrasting amazingly against the golden brown colour of the topaz crystals they are covering. The topaz crystals are around 1 – 3 cm in size and exhibit inclusions of small bixbyite crystals. The samples are small so will come supplied in a small polythene bag with an information label.
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Specimens of topaz with bixbyite from Topaz mountain, Utah, USA. Bixbyite is a manganese iron oxide mineral which often has a black colouration, the colour is further enhanced by the minerals metallic lustre. A rare mineral, it is a must have for the more serious collector, it was named in honour of the American mineralogist Maynard Bixby, who lived between 1853–1935 and was responsible for its discovery in 1897. It is often found alongside other minerals, such as in these examples where it is found in clusters around beautiful, golden topaz crystals. The topaz crystals are around 1 – 2.5 cm in size and exhibit inclusions of small bixbyite crystals. The samples are small so will come supplied in a small polythene bag with an information label.
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Iron and manganese mix collected from the Lecht Iron Mines of Tomintoul, Aberdeenshire. Specimens are supplied in either a white card tray with an information label attached ( various sizes available ) or a small magnification box . Suitable for geologists, collectors or those imply interested in mineralogy.
Out of stock
Specular hematite mineral specimens from Florence Mine, Egremont, Cumbria. They are on a massive hematite matrix, black in colour with a metallic lustre giving the samples a silver, shimmering appearance. The specularite has excellent but small anhedral crystal habits. Available in a range of sizes, the pieces will come supplied in a card tray with label.
Out of stock
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.
60 in stock
Manganese crystals within massive calcite, these mineral specimens come from Oughoud, Morocco and exhibit dark, almost black manganese crystals growing within a massive calcite matrix. Specimens are available in multiple sizes and come supplied in a card tray with an information label.
Out of stock
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.
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.
Specimens of malachite and chrysocolla found in Congo, Africa. Specimens are supplied in a white card tray with an information label.
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.
Chromite mineral specimens from Feragen chromium mines, Feragen, Røros, Sør-Trøndelag, Norway. Specimens are found along side many dunitic rocks as expected of this site, they are black in colour and fairly dense, available in a range of sizes, each supplied in a labelled card tray.
TOXIC SUBSTANCE!
Crocoite mineral specimens, composed of long single crystal clusters on a matrix, vibrant orange in colour, found in the famous Adelaide mine, Dundas, Tasmania, Australia, these are high quality, excellent specimens and are available in various sizes, supplied in a mag box or card tray with an information label. Due to the toxicity of this mineral, it will also come in a grip seal polythene bag.
2 in stock
Magnetite lodestone mineral specimens from Mexico, a variation of magnetite and is highly magnetic, the mineral may pick up iron filings, giving it a hairy appearance, specimens are black, have a dull metallic lustre and are dense for their size. Available in small sizes only they will come in a 1.5″ size tray with a label.
4 in stock
Iceland spar mineral specimens from Santa Eulalia, Chihuahua, Mexico, samples are crystal clear, exhibit perfect rhombic shape and excellent double refraction. They are available in 2 sizes only and will come supplied in a card tray with a label.
20 in stock
Sodalite mineral specimens with a rich royal blue colouration, named due to its sodium content, it is part of a family of minerals which include hauyne, nosean, and lazurite and is a well known ornamental gemstone. Very eye catching and beautiful for colectors of those wanting something striking to show, samples are available in two sizes and come supplied in a card tray with a data label.
Petalite mineral specimens from Bikita, Zimbabwe. Also known as Castorite, petalite is a well known mineral, it is a major source of lithium and is described as having a perfect monoclinc cleavage. These samples which we supply are a pale pink colour and available in 3 sizes, supplied in a card tray with an information label.
20 in stock
Brimstone (elemental sulphur). A soft, bright yellow mineral. These specimens are a by-product of the oil & gas refining process.
30 in stock
Limonite mineral specimens from the famous Cooper Peedy deposits, Australia. These samples exhibit excellent brown colouration, banded with yellow and have a typical earthy texture expected. A major iron ore, these samples may also contain opal. Available in various sizes with a card tray and label.
23 in stock
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