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PRODUCTS BY WEIGHT
BOX SETS
PLASTIC DISPLAY PRODUCTS
PRODUCTS BY WEIGHT
BOX SETS
PLASTIC DISPLAY PRODUCTS
£10.00 ex VAT
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 kilogram of purple quartz mineral specimens from Morroco, the crystal beds exhibit quartz crystal points in beds on agate or chalcedony, the colour is a hue of purple, but faded. Sizes of samples supplied in the pack vary between 20 mm to 60 mm and come in a polythene bag with an data card. Suitable for craft use, schools and more where more pieces are required.
Orange calcite is a coloured variation of the mineral calcite (calcium carbonate), it has an orange hue to it due to the presence of haematite impurities, these particular specimens exhibit a more crystalline, fine grained crystal texture in which the individual crystals are too fine to be seen, however, the crystal have grown and interlocked with each other to form a large mass, known as ‘massive’. Calcite its self is among the most common mineral found naturally, quite often as mineral deposits but also in many sedimentary rocks, either as a cement or as crystal inclusions, particularly limestone. It is well known for being a fairly soft mineral, easily scratched, coming in at 3 on the Mohs scale of hardness. These particular pieces are suitable for enthusiasts and educational use, both because of the calming blue colour and also the crystal structure and as a means to display the various colours a mineral can be found. Supplied in lots of 1kg, in a heavy duty polythene bag with information label.
1 in stock
1 kilogram of biotite mica from Pakistan, this popular black variant of mica forms in sheets with an excellent basal cleavage, often refered to as books, they are ideal for educational material or kits, supplied by weight, the mineral specimens will come in a polythene bag with an information label.
35 in stock
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 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.
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
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.
47 in stock
Specimens of Talc, collected from Egypt. Talc is a common clay mineral that is easily identifiable due to its greasy texture. Talc is extremely soft, with a hardness of just 1 on Mohs scale and is also the primary component in talcum powder. These specimens are pale green in colour. They come in a heavy duty polythene bag with pieces of various sizes.
Calcite rhombs, excellent mineral specimens supplied by 1 kilogram weight, the samples show a cubic cleavage as expected and vary in colour between white, grey and brown. A very soft mineral, calcite scratches easily and reacts with weak acid by fizzing. It will be supplied in a polythene bag along with an information card.
Oligoclase specimens supplied by weight. These particular specimens are rough and unpolished, also containing quartz and come from India, the samples will come supplied in a polythene bag along with an information card, the pieces inside will vary in size between 20 mm to 75 mm, purchasing by weight is ideal for classes, kits or other events where larger quantities are required for a more cost effective price.
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.
43 in stock
1 kilo of Carnelian mineral specimens from India. Carnelian is a variety of chalcedony, which is also a variety of quartz. These specimens range from a deep orange/red to a bright orange colour, and show typical waxy texture. Sizes vary between 20 mm to 50 mm and come supplied in a polythene bag with a data label. Ideal for when large quantities are required for an economical cost.
Out of stock
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