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Specimens of biotite mica from Madagascar. These samples of biotite mica are of a higher quality than our specimens from Pakistan and Norway, they are supplied in a white card tray with an information label.
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Phone: +1 (23) 456 789
Specimens of biotite mica from Madagascar. 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. These samples of biotite mica are of a higher quality than our specimens from Pakistan and Norway, they are supplied in a white card tray with an information label.
Weight | 150 g |
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Specimen Size | 2" x 2", 3" x 2", 3" x 3", 4" x 3", 5" x 3.5" |
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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.
Out of 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.
98 in stock
Lepidolite mica mineral specimens, exhibiting excellent sheet cleavage crystals as expected, the samples are a viva lilac colouration and come from Brazil, well known as a source of lithium, these pieces are available in multiple sizes and come in a card tray with a data label.
Out of stock
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.
986 in stock
Garnet mica schist from Loch Tay, Scotland, showing in excellent detail the effects of regional metamorphism along plate boundaries, the garnets push the mica crystals around it due to being stronger, the specimens are available in various sizes or as a cut and lacquered piece, supplied in a card tray with a data label.
56 in 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
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.
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.
Pyrtic crystal cubes from Spain, depicting excellently the cubic crystal form that pyrite forms in. These samples exhibit the brassy colouration and metallic lustre expected from pyrite and are available in two sizes, 1 cm and 2 cm cubes, supplied in a polythene bags with a data label.
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
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.
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
Stunning red quartz ( Hematoide ) over a baryte matrix collected from Jebel Saghro in Morocco. This unique variety of quartz owes its red colour to very fine hematite inclusions which have become incorporated into the quartz mass
Out of 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.
Out of stock
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.
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.
Salt Pseudomorphs on a limy marl matrix collected from the Triassic Aust Cliff in Avon. Numerous cubic imprints can be identified on the limy marl substrate of these specimens; they serve as interesting educational pieces.
20 in stock
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