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1 kilo of Chromite mineral specimens from Norway, the chromite appears black in colour and can also come mixed with serpentine (green). Often found in peridotite from the Earth’s mantle, the specimens are a massive form and are very dense.These mineral specimens are ideal for schools, educational and teaching use, specimens are supplied in a range of sizes and come in a strong polythene bag by kilo weight.
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Chromite mineral specimens exhibiting the dense weight expected of chrome rich minerals, chromite is an iron chromium oxide mineral which belongs to the Spinel group, a classification of minerals based on their unique crystalographic structure and lattices. Chromite can often be found as a lens inclusion in peroditites or in other layered ultra mafic rocks. It is also known to be asociated with serpentine, indeed, it almost looks and feels like a black variation. These particular specimens were collected by staff and come from the Feragen Chromium Mines district in Feragen, Røros, Sør-Trøndelag, Norway. The chromite mineralisation at these sites is almost exclusively confined to the dunitic members which can be traced for more than 300 m along strike. The 235 occurrences which were exploited in this area yielded 32,500 metric tons of ore, representing about 90% of the total Norwegian chromite ore production. Mostly the deposits are in shallow pits, which cover a large area of the hillside. They were exploited during the second World War and have been abandoned for many years. These samples of chromite come supplied in a polythene bag up to a weight of 1 kilogram and include an information card, sealed with a cable tie, minerals by weight are more economical when large quantities are required.
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1 kilo of muscovite mica mineral specimens from Pakistan. A common form of mica group minerals, these specimens show typical crystalline material in “books” or flaky forms. It is clear with a pearly luster which is seen on the cleavage faces, and is the main mineral which often gives rocks a ‘sparkly’ look. Ideal for schools, educational and teaching use, specimens supplied are a range of sizes and come in a strong polythene bag by kilo weight.1 kilo of muscovite mica mineral specimens from Pakistan. A common form of mica group minerals, these specimens show typical crystalline material in “books” or flaky forms. It is clear with a pearly luster which is seen on the cleavage faces, and is the main mineral which often gives rocks a ‘sparkly’ look.
1 kilogram of galena with baryte, collected from Morocco, these mineral specimens are excellent to show associations between certain ores. The samples vary between 20 mm to 50 mm in size and come supplied by weight in a polythene bag with an information label. These contrast of colours between off white baryte and blue galena with a metallic lustre, make for instresting samples to observe. NOT SUITABLE FOR CHILDREN UNDER 12 YEARS OLD.
48 in stock
Blue calcite mineral samples supplied by weight, this blue variation is due to the presence of oxidised copper impurities within the crystals. These particular samples also show the rhombic crystal structure of calcite and can easily be seen with the naked eye. When formed in masses such as these pieces, the samples are known as ‘massive’. This blue calcite is available by weight, starting from 500 grams, and is suitable for lapidary, educational and enthusiasts use. the pieces vary from 20 mm to 100 mm though most pieces will sit in-between and come supplied in a polythene bag with a label.
Out of stock
500 grams of Galena mineral specimens from Cumbria, UK. Galena is the main mineral ore or lead often found in ore veins with sphalerite, pyrite, chalcopyrite, etc and in sedimentary rocks as beds or impregnations, the Galena specimens show typical cubic cleavage and have a dull metallic lustre.
12 in stock
1 Kilo of Pyrite mineral specimens from Morocco, commonly know as ‘Fools Gold’ The specimens show the typical brassy yellow colour which some mistake for gold, as well as the usual cubic cleavage on the mineral faces. Ideal for schools, educational and teaching use, specimens supplied are a range of sizes and come in a strong polythene bag by kilo weight.
48 in stock
1 kilo of white quartz mineral specimens from Norway, also known as snow quartz, or milky quartz, milky quartz is a white coloured variety of the quartz mineral. Ideal for schools, educational and teaching use, specimens supplied are a range of sizes and come in a strong polythene bag by kilo weight.
1 kilo of Magnetite mineral specimens from Norway, the specimens are the massive form of magnetite, and are a dark grey, black colour. Magnetite is a ferrimagnetic mineral and the most naturally occurring magnetic mineral found. Ideal for schools, educational and teaching use. Iron rich examples of pure black magnetite ore from the famous Nesikilen mines. Arendal. Aust-Agder. Southern Norway. These samples are supplied by weight and come in varying sizes along with an information card.
1 kilo of brown Dolomite mineral specimens from Cumbria, UK. The crystals are often a rhombohedral shape and are on crystal beds which are a pale brown colour. Dolomite is an important sedimentary and metamorphic mineral, found in dolostones and metadolostones, and as an important mineral in limestones and marbles where calcite is the major mineral present. These samples are supplied by weight in lots of 1 kilo and come supplied in polythene bag with an information card, suitable for large quantities with an economical price.
17 in stock
Halite mineral specimens supplied in bags of 1kg. Excellent quality samples mined from Bouldy mine, Redcar in Yorkshire, UK, the pieces are clear to orange and transluscent, some may show cubic crystal cleavage too as well as inclusions of clay. Supplied in a bag of 1kg along with an information card.
1 kilogram of chalcedony fragments from lined geodes, collected from Morroco, these mineral specimens exhibit a botryoidal crystal form and a faded blue or white colour.The sizes of the samples vary between 20 mm to 60 mm and come supplied in a polythene bag by weight, ideal where larger quantities may be required for a low cost such as for schools, talks, kits or more.
1 kilo of gypsum mineral specimens, particular the variant, satin spar These samples exhibit the needle like fibrous crystal structure expected of gypsum. Ideal for schools, educational and teaching use or for when bulk amounts are needed, specimens supplied are a range of sizes between 20 mm and 40 mm and come supplied in a polythene bag with an information card.
45 in stock
1 kilo of quartz geode fragments from the Sahara desert, Morocco. The specimens are random single pieces of split geodes lined with the mineral quartz, giving off a sparkling white colour. Ideal for schools, educational and teaching use, specimens supplied are a range of sizes and come in a strong polythene bag by kilo weight along with a data card.
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