Tenacity
Brittle
Brittle
Solubility
-
Dilute acid
Durability
-
-
Specific Gravity
2.00-2.452.93-2.96
1
7.18
👆🏻
Fracture
Sub-Conchoidal, Conchoidal
Subconchoidal, Conchoidal
Cleavage
none
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
2-43.5-4
2
10
👆🏻
Chemical Composition
Cu2H2Si2O5(OH)4
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references