Tenacity
-
Brittle
Solubility
-
Poorly soluble in dilute HCl
Durability
-
-
Specific Gravity
2.71-2.722.80-2.95
1
7.18
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Fracture
Fibrous
Conchoidal
Cleavage
{???} Good
Perfect on {10 1 1}, rhombohedral cleavage
Mohs Hardness
6-6.53.5-4
2
10
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Chemical Composition
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references