Tenacity
Brittle
-
Solubility
-
Partially soluble in water
Durability
-
-
Specific Gravity
5.85-6.151.77
1
7.18
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Fracture
Conchoidal
-
Cleavage
Fair in four directions forming octahedrons
Perfect on {10 1 0}
Mohs Hardness
3.5-42-2.5
2
10
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Chemical Composition
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)