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Specimens of molybdenite in a feldspar matrix from Buskerud in Southern Norway. Molybdenum disulfide (MoS2) otherwise known as Molybdenite is the primary ore of the rare earth metal Molybdenum. This element rarely occurs in pure form in nature and it is from minerals like molybdenite that it can be extracted. The mineral is often formed in hydrothermal veins. In recent years it has become an important factor of alloy production, particularly that of steel and stainless steel. The mineral is similar to Graphite, both in lustre and habit – molybdenite also leaves behind residue when touched (although this is harmless). This interesting property is a result of the molecular structure of the mineral, in which one molybdenum atom is sandwiched between two sulphur atoms, which is repeated in layers, allowing the individual layers to move over each other in the same way a conveyor would. Samples are supplied in a white card tray with an information label. A must have addition to any mineral collection.
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Specimens of molybdenite in a feldspar matrix from Buskerud in Southern Norway. Molybdenum disulfide (MoS2) otherwise known as Molybdenite is the primary ore of the rare earth metal Molybdenum. This element rarely occurs in pure form in nature and it is from minerals like molybdenite that it can be extracted. The mineral is often formed in hydrothermal veins. In recent years it has become an important factor of alloy production, particularly that of steel and stainless steel. The mineral is similar to Graphite, both in lustre and habit – molybdenite also leaves behind residue when touched (although this is harmless). This interesting property is a result of the molecular structure of the mineral, in which one molybdenum atom is sandwiched between two sulphur atoms, which is repeated in layers, allowing the individual layers to move over each other in the same way a conveyor would. Samples are supplied in a white card tray with an information label.
Weight | 50 g |
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Specimen Size | 1" Sized Piece |
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Pyrite in massive form, from Folldal, Norway. Collected by staff, these crystalline textured mineral specimens exhibit a metallic lustre, brassy colouration and shine when viewed under certain lighting conditions. The iron ore is dense and solid, but can break fairly easily, occurrences of chalocpyrite may also be seen in some pieces. These samples are available in various sizes and come supplied in a card tray with a label, ideal for educational use, children and collections.
Native copper ore mineral specimens from the famous Keweenaw copper deposits of Mitchigan, U.S.A. The specimens have a heavy red-orange metallic specimens with streaks of blue-green oxidation and a wiry crystal habit. Available in a range of sizes.
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
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.
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.
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.
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.
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
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.
Blue lace agate mineral specimens of moderate size which clearly exhibit alternating bands of blue and white, the specimens come from Botswana and are excellent grade with minimal matrix on them. Formed through volcanic processes and the deposition of silica compounds in igneous rocks, these minerals are both important educationally and calming to look at.
Out of stock
Baryte (also spelt barite) is a widely occurring mineral consisting of barium sulphate, they can occur with many crystal habits, in this case, these mineral specimens exhibit the cockscomb mass form, in which randomly orientated blades of the mineral occur on a massive bed. These particular specimens are a pink or orange colour with a pink bed but other colours of baryte exists, including white, buff or brown. Any barite specimen is incredibly dense, with small pieces even feeling heavier than they appear, which is surprising, considering it is a non metallic mineral. This density was how the mineral obtained its name, being derived from the Greek word ‘βάρυζ’ meaning heavy. It occurs in a range of environments and deposited via many processes including biogenic, hydrothermal and evaporation, among others. Commonly occurring in lead-zinc veins hence some of the samples contain galena (lead sulphide) as well. Over 75% of baryte extracted worldwide is used for weighting driling fluids in oil and gas exploration to control high formation pressures and prevent blowouts. These mineral specimens were mined in Mibladen, Morocco, they are available in various sizes, each specimen is supplied in a labelled card tray.
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.
434 in stock
Desert rose mineral specimens composed from gypsum found in Tunisia, the samples are composed of numerous crystals which resemble ‘petals’ which are randomly orientated, thus giving them a rose flower effect. Specimens are supplied in a 1.5″ x 1.5″ card tray or as approximately 1 cm diameter pieces in 1″ magnifier boxes with an information label.
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