Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.16-3.433.7-3.9
1
7.18
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Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
{110} Good, {110} Good
{001} perfect; {111} imperfect, may exhibit parting on , {011}
Mohs Hardness
5-65.5-6
2
10
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Chemical Composition
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)
MgOMichael OâDonoghue , Gems, Sixth Edition (2006)