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1 kilo of orthoclase feldspar mineral specimens from Norway. The mineral specimens are a pale pink colour, and show the typical cubic cleavage expected from orthoclase feldspar. Ideal for schools, educational and teaching use, specimens supplied are a range of sizes and come in a strong polythene bag by kilo weight.
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Orthoclase feldspar is a well known mineral and a common constituent found in many igneous rocks. It has two cleavage planes, which are at right angles to one another, resulting in the crystals breaking into rhombic forms and is the reason for its naming, being derived form the ancient Greek wording for “straight fracture.” It is often pink in colour but can be white or pale grey. It is fairly hard at 6 – 6.5 on the Moh’s scale of hardness and has a vitreous lustre, which means it shines or reflects light. Orthoclase is commonly found in many granitic rocks, being one of the main constituent minerals, the other two being quartz and mica. It is also common in felsic rocks such as rhyolite. These specimens are supplied by weight, upto 1 kilograms and come supplied in a polythene bag with an information label, the sizes of the pieces inside vary between 20 mm to 80 mm.
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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 kilo of Pyrite in Massive form, from Norway. Pyrite massive is a crystalline rock form of the popular mineral specimen, Pyrite. Also known as ‘Fools Gold’ The Pyrite massive mineral specimens appear to shine in a glittering manner when exposed to the sun or a bright light. Ideal for schools, educational and teaching use.
500 in stock
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
1 kilo of rose quartz mineral specimens. A pink colour variation of the mineral Quartz is a popular mineral specimen due to its vibrant pink colour making it stand out. Ideal for schools, educational and teaching use, specimens supplied are a range of sizes and come in a strong polythene bag by kilo weight, sizes varying between 20 mm to 70 mm. They may also have sharp edges and care is advised when handling the samples.
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.
51 in stock
1 kilo of moss agate mineral specimens from India. Agate is a distinctly banded variety of chalcedony, belonging to the quartz family. These particular specimens are a dark green colour, hence the name ‘moss agate’ but sometimes may exhibit red spots, known as blood stone. Kilo bags are ideal for schools, educational and teaching use, specimens supplied are a range of sizes and come in a strong polythene bag with a label.
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 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.
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.
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 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 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.
Out of stock
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