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

Collectible minerals - full range in stock "Graphite"

Graphite is a high-temperature mineral of volcanic and igneous rocks, as well as pegmatites and skarns. The mineral of the class of native elements is native carbon. The name of the mineral comes from the ancient Greek "to write". The crystal lattice of the mineral consists of parallel layers, loosely connected to each other. Therefore, when rubbing against the surface, they "slide", remaining on it, due to which graphite has been used for writing since antiquity. Natural graphite has varieties:

- densely crystalline (core)

- crystalline (scaly)

- cryptocrystalline (amorphous, microcrystalline).

Graphite is a good conductor of electricity. Like talc, it has a hardness of 1 on the Mohs scale, but is also found harder. Widely used in industry.

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

Physical properties of Graphite

General
Category Native mineral
Formula
(repeating unit)
C
IMA symbol Gr
Strunz classification 1.CB.05a
Crystal system Hexagonal
Crystal class Dihexagonal dipyramidal (6/mmm)
Hermann–Mauguin notation: (6/m 2/m 2/m)
Space group P63mc (buckled) P63/mmc (flat)
Unit cell a = 2.461, c = 6.708 [Å]; Z = 4
Identification
Color Iron-black to steel-gray; deep blue in transmitted light
Crystal habit Tabular, six-sided foliated masses, granular to compacted masses
Twinning Present
Cleavage Basal – perfect on {0001}
Fracture Flaky, otherwise rough when not on cleavage
Tenacity Flexible non-elastic, sectile
Mohs scale hardness 1–3
Luster Metallic, earthy
Streak Black
Diaphaneity Opaque, transparent only in extremely thin flakes
Specific gravity 1.9–2.3
Density 2.09–2.23 g/cm3
Optical properties Uniaxial (−)
Pleochroism Strong
Solubility Soluble in molten nickel, warm chlorosulfuric acid
Other characteristics strongly anisotropic, conducts electricity, greasy feel, readily marks
Code: 1417
Boevsky graphite mine, Kaslinsky district, Chelyabinsk region, Southern Urals, RF
69*51*12mm

0.00 $ $30.91

Code: 537
Taiginsk deposit, Kyshtym, Chelyabinsk region, South Ural, RF
38*25*6mm

0.00 $ $10.18

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