Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.70-3.902.50-2.80
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
Perfect on {011}, fair on {100}, poor on {110}
Perfect
Mohs Hardness
3.5-45-6.5
2
10
👆🏻
Chemical Composition
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 4(Al,Si) 12O 24Cl to Ca 4(Si,Al) 12O 24(CO 3,SO 4)Arthur Thomas , Gemstones (2009)