Tenacity
Brittle
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
2.67-2.733.90-4.00
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on [10 1 1] three directions with angle of 74° 55
Perfect on {001}, good on {210}, poor on {010}
Mohs Hardness
33-3.5
2
10
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Chemical Composition
CaCO 3Ulrich Henn and Claudio C.
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references