Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.80-4.152.34-2.51
1
7.18
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Fracture
Uneven
-
Cleavage
perfect along [010] and [100]
None
Mohs Hardness
3.5-4-9999
2
10
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Chemical Composition
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O