Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.45-3.555.85
1
7.18
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Fracture
Uneven
Conchoidal, Uneven
Cleavage
{100} Perfect, {010} Perfect
Distinct on {10 1 1}, imperfect on {01 1 2}
Mohs Hardness
5-62.5-3
2
10
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Chemical Composition
(Fe,Mg) 2Si 2O 6Ulrich Henn and Claudio C.
Ag 3SbS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references