Tenacity
-
Brittle
Solubility
Partly soluble in HCl.
Soluble
Durability
-
-
Specific Gravity
3.32-3.433.30-3.50
1
7.18
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Fracture
Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
{100} perfect; {110} and {1 1 0} good; {010} poor
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
5.5-65
2
10
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Chemical Composition
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references