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Diameter, mm (1mm - 0,039inch)

Stone sphere balls - full range in stock "Mica"

Micas are a group of aluminosilicate minerals with a layered structure and having the general formula Na2(Al, Mg, Fe, Li)3 [AlSi3O10](OH, F)2. Mica is one of the most common rock-forming minerals in intrusive, metamorphic, and sedimentary rocks.

You can see mica stone for sale and buy it in the Minerals of Russia online store.

Physical properties of Mica

General
Category Phyllosilicates
Formula
(repeating unit)
AB2–3(X, Si)4O10(O, F, OH)2
IMA symbol Mca
Identification
Color purple, rosy, silver, gray (lepidolite); dark green, brown, black (biotite); yellowish-brown, green-white (phlogopite); colorless, transparent (muscovite)
Cleavage Almost perfect
Fracture flaky
Mohs scale hardness 2.5–4 (lepidolite); 2.5–3 biotite; 2.5–3 phlogopite; 2–2.5 muscovite
Luster pearly, vitreous
Streak White, colorless
Specific gravity 2.8–3.0
Diagnostic features cleavage

Code: 1655
Kovdor, Murmansk region, Kola Peninsula, RF
74mm

0.00 $ $240.00

Code: 817
Iron mine, Kovdor, Kola Peninsula, RF
75mm

0.00 $ $226.67

Code: 2221
North Karelia, RF
54mm

0.00 $ $56.67

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