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250 grams of chrysocolla, a popular and well known cyan blue coloured mineral with a botryoidal crystal habit, these pieces which range between 5 to 10 cm are shells. a minor copper ore mineral, the pieces are excellent for educational use, buying in bulk. Supplied in a sealed pack ready for immediate use, a small information label will also be present.
Out of stock
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Chrysocolla is a vibrant cyan coloured mineral,a minor ore source of copper, it often forms as a secondary mineral located near the oxidised zones of copper ore deposits. Its name is derived from the ancient Greek word of “chrysos kolla”, meaning gold and glue respectively, a nod towards its original use in soldering gold as far back as 315 BC. These particular pieces were found in the Democratic Republic of Congo, Africa, and exhibits a some what slight botryoidal (bubble) crystal habit, the pieces are thin, being the surface shells of larger bodies which have been removed. They come supplied in lots of 250 grams, in a sealed pack, ready for immediate use, they are suitable for educational use, obtaining many various pieces for an economical cost. The range of sizes are from 5 to 10 cm.
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Malachite and azurite mineral specimens from Morocco, the two minerals are often found together and exhibit completely different colours, the azurite is a rich royal blue where as the malachite is a pale green. Both are copper ore minerals and have been used as paint pigments in ancient times. Supplied in various sizes and in a card tray with a data label.
Out of stock
Specimens of malachite and chrysocolla found in Congo, Africa. Specimens are supplied in a white card tray with an information label.
Out of stock
Bornite with Feldspar and quartz, a strange and colourful mixture of minerals and crystals making a unique specimen, these pieces were collected by staff from Tysfjord, Northern Norway, due to the content, they have a vibrant metallic colouration and are available in 3 sizes, supplied in a card tray with a label.
Malachite mineral specimens from Morocco, the samples exhibit a fibrous crystal texture and has a eye catching green colouration. Specimens are available in 2 sizes and come supplied in a card tray with an information label. Ideal for collectors and educational use, malachite is well known through out history for its primary use as a major copper ore.
Out of stock
Chrysocolla, hydrated copper silicate mineral specimens are a minor ore of copper. Turquoise blue specimens collected from Dunfreis in Scotland; various sizes available, each supplied in a labelled card tray.
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 amethyst mineral specimens, these crystal beds are faded purple in colour showing typical crystal forms. 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 50 mm and come supplied in a polythene bag with an information card.
Out of 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
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.
The mineral size ranges from approx 1cm in size down to fine grains. Supplied in a thick, sealed polythene bag with label containing 250 grams.
Out of stock
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 aragonite sputniks, also known as twinned aragonite crystals, these mineral specimens are roughly 20 mmto 40 mm in size, they exhibit an orange colouration and numerous radiating crystals similar to the Russian satellite, ‘Sputnik’. They come from Morocco are supplied in a polythene bag with a data label, purchasing them by weight is ideal if they are intended for educational use, talks, kits or other events where larger quantities are required for an economical cost.
1 kilo of Limonite mineral specimens from Australia, a common material in oxidized zones of iron-bearing deposits. Limonite is produced by decomposition of iron minerals, e.g. pyrite etc. These specimens are an earthy brown colour, and some will show banding features. ideal for schools, educational and teaching use.
Out of stock
1 kilo of clear transparent rock crystal chunk mineral specimens. The rock crystal mineral specimens are a clear form of quartz, they show a conchoidal fracture when observed closely and are 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 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
1 kilogram of rock crystal points and bodies (fragments) from Morocco, transparent with inclusions, this B grade material varies in size between 20 mm to 100 mm, also known as quartz points, they are excellent value for money where large quantities may be required such as for crafts, educational use, kits or more. Supplied in a polythene bag with a label.
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
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