Tenacity
Brittle
Brittle
Solubility
insoluble in water
insoluble
Durability
-
-
Specific Gravity
5.00-5.206.86-7.03
1
7.18
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Fracture
Uneven, Conchoidal, ConchoidalWalter Schumann
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
Indistinct on {001}; partings on {011} and {111}
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
6-6.56-7
2
10
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Chemical Composition
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references