Physical Properties
Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.70-3.953.26-3.36
1
7.18
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Fracture
-
Conchoidal
Cleavage
1,1 basal.
Good on {100}
Mohs Hardness
3.5-46.5-7
2
10
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Chemical Composition
(Cu) 3(OH) 2(CO 3) 2 + Cu 2(CO 3)(OH) 2Gemdat.org , Management Team (2012)
(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references