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Charoite
Charoite

Pyrrhotite
Pyrrhotite



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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.54-2.78
Conchoidal
Good in three directions
5-6
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
 
-
Soluble
-
4.58-4.65
Uneven
Absent
3.5-4.5
Fe1-xS