Physical Properties
Tenacity
Brittle
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.20-3.252.67-2.73
1
7.18
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Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
Good/distinct on [210]
Perfect on [10 1 1] three directions with angle of 74° 55
Mohs Hardness
5.53
2
10
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Chemical Composition
Mg 2Si 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaCO 3Ulrich Henn and Claudio C.