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BOX SETS
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PRODUCTS BY WEIGHT
BOX SETS
PLASTIC DISPLAY PRODUCTS
£2.25 – £3.50 ex VAT
Biotite mica mineral specimens from Baluchistan, Pakistan available in moderately thick laminar sheets, as expected of this mineral, the samples exhibit a black colouration with a dull lustre. They serves as excellent examples of phyllosilicate minerals for collectors or educational use, with the pieces coming supplied in a labelled card tray.
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Your return will usually be processed within a week to a week and a half. We’ll send you a Return Notification email to notify you once the return has been completed.
Please allow 1-3 business days for refunds to be received to the original form of payment once the return has been processed.
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Email: contact@mydomain.com
Phone: +1 (23) 456 789
Biotite mica is a black, platy mineral which forms in sheets, it belongs to the mica group of minerals which also includes muscovite, phlogopite and lepidolite micas. Being a common phyllosilicate mineral, it is also found in many rocks, particularly of igneous and metamorphic origin, such as mica schist, gneisses and granites. The crystal system of mica in general is monoclinic and like other mica minerals, biotite has a perfect basal cleavage and consists of flexible sheets or lamellae, which easily flake off, with tabular to prismatic crystals. For this reason, mica is used in the oil drilling process, particularly in the drilling fluid, where it acts to prevent loss of circulation and as a sealant. When micas are found in their crystal sheet form, it is often referred to as “books” as it resembles their many pages. These mineral samples of biotite mica come from Baluchistan, Pakistan and are supplied in labelled card trays and are available in two sizes.
Weight | 180 g |
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Specimen Size | 2" x 2", 3" x 2" |
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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
Pyrite cubic crystals in massive biotite mica, the pyrite crystals are well formed with the cubic form being clearly visible, as expected, the they also exhibit the yellow brassy colouration and metallic lustre expected from this mineral. The crystals are within a massive biotite mica matrix which is pure black with a vitreous lustre. This vivid contract in colours excellently highlights the brassy coloured pyrite crystals and makes for an excellent specimen to add to any mineral collection. The samples were collected by staff some years ago and come form southern Norway and is available in various sizes and come supplied in a card tray with an information label.
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.
Biotite granite thin section exhibiting abundant biotite crystals within a typical granite crystal mass. These thin sections supplement the hand specimens nicely and allow the crystallisation history of the rock to be interpreted.
We provide a full range of igneous, sedimentary, metamorphic and mineral thin sections. Click here to view them. Should you require a microscope, they can be found here.
6 in stock
Specimens of Biotite Mica, collected from Pakistan. Biotite Mica is a black, platy mineral that forms in sheets. It is a major rock forming mineral, especially in rocks of igneous or metamorphic origin. Specimens come in lots of 1kg, in a heavy duty polythene bag with an information label. Pieces come in various sizes.
35 in stock
Lepidolite mica mineral specimens exhibiting a fine crystalline and granular form as opposed to a single sheet. These samples come from Zimbabwe and though are massive, still exhibit a lilac colouration and metallic lustre, available in various sizes and supplied in a card tray with a data label.
50 in stock
These specimens were collected from an old apatite mine in southern Norway. Specimens have a brown coppery colour and are supplied in a 2″x2″ 3″x2″ 4″x3″ card tray with label.
95 in stock
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.
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 blue, white, red and orange and available in various sizes, supplied in a card tray with an information label.
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.
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.
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.
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.
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.
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 (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.
Cleavelandite is a variety of the mineral albite, one of the constituent minerals of plagioclase feldspar, thus is found in areas where pegmatites and granites exists in certain localities around the world. These particular specimens come from Evje, in Southern Norway and as expected, has a pale green colouration to it. As with albite, cleavelandite also exhibits a triclinic crystal habit and has a hardness of 6- 7 on the Moh’s scale of hardness, it is usually found within cavities of other rocks or minerals. It as named in 1823 by Henry J. Brooke in honor of Parker Cleaveland , professor of geology and mineralogy at Bowdoin College in Maine. Our mineral specimens are massive in form with occasional accessory such as smokey quartz or plagioclase or orthoclase feldspar. The specimens were collected by our own staff from Evje and are available in a range of sizes. Each specimen is supplied in a labelled card tray.
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.
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.
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