Physical Properties
Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.70-3.903.26-3.36
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {011}, fair on {100}, poor on {110}
Good on {100}
Mohs Hardness
3.5-46.5-7
2
10
👆🏻
Chemical Composition
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references