Tenacity
Brittle
Brittle
Solubility
-
Dilute acid
Durability
-
-
Specific Gravity
2.60-2.652.93-2.96
1
7.18
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Fracture
Uneven, Conchoidal
Subconchoidal, Conchoidal
Cleavage
Perfect on {001}, very good on {010}, imperfect on {110}
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
6-6.53.5-4
2
10
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Chemical Composition
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references