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Shungite
Shungite

Sellaite
Sellaite



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Physical Properties

Tenacity

-
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

-99993.14-3.16
1 7.18
👆🏻

Fracture

-
Conchoidal

Cleavage

None
Perfect on {010} and {110}

Mohs Hardness

-99995-5.5
2 10
👆🏻

Chemical Composition

C
MgF 2Ulrich Henn and Claudio C.