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Chromite mineral specimens from Feragen chromium mines, Feragen, Røros, Sør-Trøndelag, Norway. Specimens are found along side many dunitic rocks as expected of this site, they are black in colour and fairly dense, available in a range of sizes, each supplied in a labelled card tray.
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Chromite mineral specimens exhibiting the dense weight expected of chrome rich minerals, chromite is an iron chromium oxide mineral which belongs to the Spinel group, a classification of minerals based on their unique crystalographic structure and lattices. Chromite can often be found as a lens inclusion in perodities or in other layered ultra mafic rocks. It is also known to be asociated with serpentine, indeed, it almost looks and feels like a black variation. Thjese particular specimens were collected by staff and come from the Feragen Chromium Mines district in Feragen, Røros, Sør-Trøndelag, Norway. The chromite mineralisation at these sites is almost exclusively confined to the dunitic members which can be traced for more than 300 m along strike. The 235 occurrences which were exploited in this area yielded 32,500 metric tons of ore, representing about 90% of the total Norwegian chromite ore production. Mostly the deposits are in shallow pits, which cover a large area of the hillside. They were exploited during the second World War and have been abandoned for many years. Specimens are available in a range of sizes, each supplied in a labelled card tray.
Weight | 300 g |
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Specimen Size | 1.5 " x 1.5", 2" x 2", 3" x 2", 4" x 3" |
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Dunite igneous rock specimens from the Gusdal olivine pit in Åheim, southern Norway. Composed of green olivine minerals with chromite and pyroxene crystals, the rock forms as intrusive igneous plutons in the earth mantle down to 400 km deep and displays a coarse texture and green colouration. Overall, the samples are fairly granular and weak due to their chemistry and form part of the basal gneiss complex of southern Norway. Ideal for various levels of collectors and for higher level education and research use, the samples are available in three sizes and come supplied in a card tray with an information label.
We also supply Dunite thin sections for microscope study which are available to buy HERE.
Specimens of Chrome Dioside in a Calcite and Tremolite matrix found in Mo i Rana, Norway. Limited amounts available. Each specimen is supplied in a labelled card tray.
45 in stock
Olivine mineral specimens from Åheim, Norway, samples vary from granular to crystalline but all exhibit a bright olive green colouration. Collected by staff, olivine is a subsurface mineral which is unstable at the surface and weathers easily, making it rare. It may also contain the gemstone, peridot as well as kammererite. Available in various sizes and supplied in a card tray with an information label.
Specimens of serpentine with martite & hydrocalcite found in Modum, Norway. Specimens are supplied in a white card tray with a information label.
Out of stock
Chalcopyrite mineral samples from Morocco, exhibiting typical yellow brassy colour with a metallic lustre. Lower grade when compared to our Norwegian stock but also includes occurrences of bornite which is a blue colour. Samples are available in 3 sizes, each supplied in a labelled card tray.
184 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.
Rhodolite garnets in quartz and mica schist matrix from Southern Norway exhibiting bright vibrant pink coloured garnets in a white quartz and metallic grey mica schist with a start contrast of colours, these minerals specimens are available in 3 sizes and come supplied in a card tray with a label.
Specimens of small almandine garnets found in India. These specimens are supplied in a small white card tray with an information label. The specimens are approximately 1″ – 1.5″ cm in diameter though this will vary slightly.
18 in stock
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.
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.
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.
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.
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.
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.
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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