Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.23-3.263.08-3.12
1
7.18
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Fracture
Conchoidal
ConchoidalWalter Schumann
Cleavage
Perfect on {010} imperfect on {100}
{010} Perfect
Mohs Hardness
6.5-77.5
2
10
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Chemical Composition
Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references