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PRODUCTS BY WEIGHT
BOX SETS
PLASTIC DISPLAY PRODUCTS
PRODUCTS BY WEIGHT
BOX SETS
PLASTIC DISPLAY PRODUCTS
£1.50 – £2.25 ex VAT
Chalcedony mineral specimens from Morocco, the pieces belong to the quartz family of minerals and is very similar to carnelian, even having a waxy lustre, although it tends to have a botryoidal crystal habit. The pieces are white, grey and black and available in various sizes, supplied in a card tray with an information label.
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Chalcedony is a cryptocrystalline form of silica, comprised of the polymorphs quartz and moganite. Typically, chalcedony has a waxy lustre and a botryoidal (bubbly) appearance, commonly it is blue in colour, but reds, oranges and white are also present, sometimes mixed together. Chalcedony, along with carnelian has been used throughout history as a gemstone, its pearly lustre when polished has seen it used in various pendants, seals and broaches. It was also used much earlier than that as pre-historic tools and implements such as spear and arrow heads due to the conchoidal fracture that chalcedony has, like other quartz minerals, it tends to break similar to glass. Such examples of primitive chalcedony tools have been found as far back as the Bronze age. These specimens of chalcedony come from Morocco, they are mostly opaque and white,black and grey in colour but interestingly some also fluoresce brown or orange when exposed to shortwave UV light. Available in a range of sizes each supplied in a labelled card tray.
Weight | 180 g |
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Specimen Size | 1.5 " x 1.5", 2" x 2", 3" x 2" |
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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.
Specimens of Chalcedony, collected from Morocco. Chalcedony is a silicate mineral, with a waxy lustre and botryoidal appearance. These specimens come in lots of 1kg, in a heavy duty polythene bag. Pieces are of various sizes.
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
Galena with massive baryte from Morocco, showing the two contrasting colours of the off white baryte and metallic blue galena mineral specimens together, both are quite dense yet extremely fragile, these samples were collected from Morocco and available in 3 sizes.
These particular samples are a milky white to pale yellow colour and show typical fibrous crystal habit expected from Witherite. Samples are supplied in a white card 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
Magnesite mineral specimens from Greece, the samples are an off white colour and exhibit a somewhat botryoidal texture, formed around ultramafic rocks and metamorphic zones, these specimens are limited and will come supplied in a card tray with a data label.
Halite mineral specimens from the Boulby mine in Redcar, North Yorkshire, UK. Halite is a salt mineral and has a cubic crystal system and vitreous lustre, these specimens are rough and available in various sizes, suitable for educational use, supplied in a card tray with a label.
30 in stock
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.
Fulgerite mineral specimens from Algeria, formed from lightening strikes which pieces the desert sands instantly melting and fusing the quartz crystals creating a light weight hollow piece of rock.
Baryte mineral specimens collected form Somerset in the UK, exhibiting a bladed crystal habit or massive form, the dense specimens are an off white, yellow or brown colour due to staining from hematite (iron ore), available in various sizes, ideal for educational use.
gypsum satin spar with an orange colouration, found in Morocco, these mineral specimens exhibit excellent fibrous texture and a silky lustre, along with the unusual orange colour, makes these particular samples very sought after simply just for their unique appearance. Available in 2″ x 2″ size pieces only and supplied in a card tray with a label.
Sulphur mineral specimens (also spelt sulfur) from Bolivia, these fine crystalline masses give off a pungent odour as expected of this mineral and have a pale yellow colouration to them. They formed in volcanic zones and are excellent for the more serious collector. Available in one size only and supplied in a card tray with a data label.
13 in stock
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