Tenacity
Brittle
-
Solubility
Dilute acid
-
Durability
-
Hard
Specific Gravity
2.93-2.962.67-2.78
1
7.18
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Fracture
Subconchoidal, Conchoidal
Uneven, ConchoidalWalter Schumann
Cleavage
Distinct on {010}, imperfect {110} and {011}
Imperfect on the [0001]
Mohs Hardness
3.5-47.5-8
2
10
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Chemical Composition
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Be3Al2SiO6