Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.58-2.804.80-4.90
1
7.18
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Fracture
Conchoidal
Uneven
Cleavage
{001} Good
{010} Indistinct
Mohs Hardness
5-5.56-6.5
2
10
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Chemical Composition
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references