Tenacity
Slightly sectile
Brittle
Solubility
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Soluble
Durability
-
-
Specific Gravity
22.67-2.73
1
7.18
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Fracture
Uneven
Conchoidal
Cleavage
Prismatic {10 1 0}, perfect
Perfect on [10 1 1] three directions with angle of 74° 55
Mohs Hardness
2-2.53
2
10
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Chemical Composition
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaCO 3Ulrich Henn and Claudio C.