Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.58-2.803.82-3.97
1
7.18
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Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
{001} Good
Perfect on [001] and [011]
Mohs Hardness
5-5.55.5-6
2
10
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Chemical Composition
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
TiO 2Michael OâDonoghue , Gems, Sixth edition (2006) More from other references