Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.70-3.902.51-2.63
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {011}, fair on {100}, poor on {110}
Perfect
Mohs Hardness
3.5-44
2
10
👆🏻
Chemical Composition
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)