Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.785.85-6.15
1
7.18
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Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
{???} Distinct, {???} Indistinct
Fair in four directions forming octahedrons
Mohs Hardness
5-63.5-4
2
10
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Chemical Composition
3CaAl 2Si 2O 8 · CaCO 3Anthony et al , Handbook of mineralogy (2001)
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references