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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.
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Olivine mineral specimens are highly sought after due to their rarity and vibrant, striking green colouration. Olivine is a mineral which often forms in the subsurface of the earths crust, for this reason, it is often unstable on the earths surface and thus weathers easily. The depth at which it forms also results in samples being quite dense for their size. It derives its name from it’s green colour which is a result of nickle and is found in mafic and ultra mafic igneous environments. When high quality crystals are found, they are known as peridot and are highly sought after as gemstones, as they can be cut, shaped and polished with drastic effects, enhancing the green colour further more. It has also been found on the surface of the moon, rocks collected from the Apollo 15 mission brought back samples of olivine basalt. Specimens may occasionally exhibit small amounts or peridot or a rare mineral, kammererite, however overall, samples supplied are granular or crystalline in texture and exhibit the typical bright olive green colour. Available in various sizes and supplied in card trays with an information label.
Weight | 600 g |
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Specimen Size | 2" x 2", 3" x 2", 4" x 3" |
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Garnet peridotite igneous rock specimens found in the Gusdal Olivine Pit, Åheim, Norway is an ultra mafic rock which contains high pressure and temperature minerals such as olivine and garnet crystals. Exhibiting a green colouraiton with striking red spots, these samples were pushed up to the earths crust during the Caledonian orogeny during the Ordovician and Devonian period over 400 million years ago. The specimens are dense as expected and are ideal for children and serious collectors because of the colourful appearance as well as for higher educational use to describe deep mantle material as well as orogenic processes. The hand samples are available in various sizes and come supplied in a card tray with an information label.
186 in stock
Olivine dolerite igneous rock specimens from Clee Hill, Shropshire, UK, composed of pyroxene minerals such as augite and magnetite as well as plagioclase feldspar. The samples are fine grained and crystalline in texture with a dense weight and black colouration. Similar in appearance to gabbro and basalt, the rock samples are suitable for serious collectors or higher level education to explain the difference in chemistry and mineralogy of igneous rocks. The samples are available in three sizes and supplied in a card tray with an information label.
70 in stock
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.
27 in stock
This pure olivine, also known as Dunite Peridotite shows a bright green colouration. The specimens come from Norway and may contain streaks of the rare mineral Kammererite which appears silver in colour. Some specimens may be granular in texture whereas some may be more crystalline. Specimens are supplied in a polythene bag in lots of 1 kg with a label.
Essexite igneous rock specimens from Lanarkshire, Scotland, UK, also known as olivine or nepheline monzogabbro is an intrusive rock with mafic chemistry, composed of nepheline and plagioclase feldspar along with olivine, magnetite minerals as well as augite phenocrysts which exhibit euhedral crystal forms. The rock has a dense weight and overall dark colouration but attractive appearance. It is locally known as Crawfordjohns and was highly sought after as a high quality material to produce curling stones. These samples are excellent for young and older collectors as well as higher educational use, the pieces are available in three sizes and come supplied in a card tray with an information label.
63 in stock
Orthocalse feldspar mineral specimens from Strathpeffer, Ross-Shire, Scotland. It exhibits a very pale pink almost white colouration and details 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.
Out of stock
Specimens of brecciated hematite found in Cumbria, UK. Specimens are supplied in a white card tray and come with an information label.
Out of stock
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
Baryte crystal blade cluster from Erfoud, Morocco, measuring up to 4 inches in size, these mineral specimens exhibiting excellent crystal habits and calming colouration along with a slight sparkle when viewed in certain lighting conditions. Ideal pieces for display use.
Out of stock
Specular hematite mineral specimens from Florence Mine, Egremont, Cumbria. They are on a massive hematite matrix, black in colour with a metallic lustre giving the samples a silver, shimmering appearance. The specularite has excellent but small anhedral crystal habits. Available in a range of sizes, the pieces will come supplied in a card tray with label.
Out of 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.
Out of stock
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
Specimens of white coloured Plagioclase Feldspar also known as a Albite-Anorthite Series mineral. The specimens come from Osedalen, Southern Norway and are supplied in a 2″x2″ 3″x2″ 4″x3″ card tray with an information label.
Out of stock
Cleavelandite mineral specimens available in various sizes, a variation of albite, it is pale green or an off white colour, these pieces come from Evje in Southern Norway and exhibit a massive form of cleavelandite. Specimens may also come with accessory minerals such as smokey quartz or other feldspars.
Out of stock
Baryte mineral specimens collected form Cumbria, 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.
Out of stock
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.
Out of stock
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