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High quality kyanite mineral specimens exhibiting a rich blue colour and long, bladed crystals. These samples come from Minas Gerais in Brazil, they may also contain quartz as well, indicating a pegmatite origin. Specimens are available in various sizes and come in a card tray with an information label.
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Kyanite is a rich blue coloured silicate mineral, even the name is derived from the ‘kyanos’ which means ‘deep blue’. It often forms in pegmatites and so is found along side other minerals such as quartz and feldspars, its presence will often indicate a high pressure metamorphic environment, and being one of few, is also used as an index mineral when determining metamorphic depth and pressure. Such details as this allow geologist to build up a picture of plate tectonics over a period of given time. It has a bladed crystal habit, which can be easily seen in our images, however the blades are fragile and can break easily if handled harshly. Specimens may also show quartz. These pieces come from Minas Gerais in Brazil, a famous locality known for producing excellent mineral samples. We have numerous sizes in stock (see drop down menu).
Weight | 500 g |
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Specimen Size | 1.5" x 1.5", 2" x 2", 5" x 3.5" |
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Muscovite mica sheets from Iveland, Southern Norway, specimens depict the basal cleavage of this mineral excellently as well as it’s elasticity, sometimes being referred to as ‘books’ of mica sheets. These samples were collected by staff from Norway, they have a vitreous lustre and are available in various sizes, all pieces supplied in a card tray with an information label.
This granite pegmatite contains large sheets of muscovite mica, orthoclase feldspar and quartz matrix. An excellent teaching material which comes from Southern Norway. Each specimen comes in a labelled card tray.
Out of stock
Kyanite with a black colouration, a rare and unusual variety from Minas Gerais, Brazil, they exhibit excellent high quality radiating sheaths of accicular crystals, starting of from a single point and radiating out into many crystal and becoming wider. The mineral specimens are 3 inches in length with widths and thickness varying from sample to sample, all come supplied in a card tray with a label.
16 in stock
Kaolinite is a clay mineral specimen which is used extensively in industry, it is a soft, fragile mineral and is also known as China clay. Formed form the breakdown of feldspar minerals, these samples come from Cornwall, UK and is available in 2 sizes, supplied in a card tray with a label.
Out of stock
Muscovite mica sheets from Brazil, an excellent mineral specimen, especially for educational use as it depicts the basal cleavage perfectly, so thin are these sheet, that even when layered, they are still transparent. They have an off brown or pink hue and some impurities. Sizes vary as do shapes, each piece will come supplied loose with an information label.
12 in stock
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.
Baryte mineral specimens, unusual samples collected from Foss mine in Scotland, they have a fine crystalline texture instead and are quite robust specimens. Pieces are off white in colour and may show a shimmer effect in certain lighting conditions. Available in various sizes, supplied in a card tray with an information label.
29 in stock
Cut ulexite mineral specimens from California, USA. A mineral similar to gypsum, ulexite is able to transmit light through its long axis, meaning if placed above an image or text, will transmit it to the samples surface as an image. Hence the name TV rock, excellent for children, these pieces are available in several sizes and will come supplied in a card tray with an information label.
Iceland spar is a clear variation of calcite, it exhibits the rhombic crystal system of calcite perfectly, the crystals easily divide into rhombs, making them well sought after for a variety of reasons. Originally reported from Helgustadir Mine, Eskifjord, Iceland, hence its name. One of the most remarkable aspect of Iceland spar is its refractive properties. When light passes through one of the crystals, it is divided into two rays at different angles which results in a double refraction effect. Essentially, anything seen though the crystal is seen in double. This can best be seen if you place the calcite over some text, it will appear as if it has been printed twice. These mineral samples come from Santa Eulalia, Chihuahua, Mexico and are available in 2 sizes: Upto 1″ and Over 1″. They come in a card tray with an information label.
Massive specular hematite from Brazil, black colouration and metallic lustre which gives the crystals a sparkling appearance. These particular specimens are of specularite crystals in a massive form, therefore the samples have a highly crystalline texture. They come from Brazil and give off a metallic shimmer when held under certain lighting. Available in various sizes and supplied in card tray with an information label.
Pyrite is a well known and common mineral found around the world, commonly known as fools gold, it has a brassy yellow colour and metallic lustre, most pyrite people will see will likely be pyrite crystal beds or chunks. These specimens are individual cubes of pyrite which demonstrate the signature cubic crystal structure. These samples are from Spain and are available in 2 sizes: 1 cm and 2 cm cubes and come supplied in a polythene bag with an information label.
Specular Hematite, also known as specularite is a variation of haematite which has a silver or black colouration and metallic lustre which gives the crystals a sparkling appearance. These particular specimens are of specularite crystals with an anhedral form on a massive haematite matrix. These specimens display veins of specularite within a matrix of massive haematite. They come from Cumbria, UK and are available in various sizes, each sample comes supplied in a card tray with an information label. They would be of particular interest to those who are particular keen on collecting British mineral specimens.
Orthocalse feldspar mineral specimens from Evje, Norway. It exhibits a pale pink, white or pale grey colouration with excellent cleavage planes with rhombic crystal forms, a common mineral found in granites and rhyolites, orthoclase belongs to the feldspar family of minerals and can be found all over the world. Specimens are available in various sizes and come supplied in a card tray with an information label.
Pyrite on Rhaetic Bone Bed collected from Westbury-on-Severn, Gloucestershire. Of our specimens it is the pyrite crystal bed which is the key feature, some specimens may exhibit bones or scales but naturally this is no guarantee
9 in stock
Specimens of Salt Pseudomorphs on a limy matrix, collected from the Triassic Aust Cliff in Avon, UK. Salt Pseudomorphs serve as important inicators of paleoenvironmental conditions. They typically form in semi arid (dry) climates, where saline water evaporates, which leaves behind cubic salt crystals. These salt crystals later dissolve, occasionally preserving their cubic imprints These specimens are available in multiple sizes and come supplied in a white card tray with an information label.
20 in stock
Chalcopyrite mineral specimens from Sulitjelma, Norway, a major copper ore mineral, these pieces exhibit excellent quality chalcopyrite detailing the shiny brassy yellow colouration and metallic lustre expected. These mineral specimens are approximately 70% – 80% chalcopyrite and are available in various sizes and come supplied in card tray with an information label.
Gypsum satin spar mineral specimens from Morocco, which are a pearly white colour composed of high quality fibrous crystals which are long and orientated in the same direction giving the samples a silky lustre. These pieces are available in various optional sizes, supplied in a card tray with a label.
432 in stock
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