Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.65-2.903.90-4.00
1
7.18
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Fracture
-
Conchoidal
Cleavage
{001} Perfect
Perfect on {001}, good on {210}, poor on {010}
Mohs Hardness
-99993-3.5
2
10
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Chemical Composition
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references