Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.34-2.515.85-6.15
1
7.18
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Fracture
-
Conchoidal
Cleavage
None
Fair in four directions forming octahedrons
Mohs Hardness
-99993.5-4
2
10
👆🏻
Chemical Composition
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references