Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.70-3.903.32-3.43
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {011}, fair on {100}, poor on {110}
Poor on {110} and {100} very poor on {001}
Mohs Hardness
3.5-46-7
2
10
👆🏻
Chemical Composition
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH)4