Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.80-4.152.55-2.65
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
perfect along [010] and [100]
Perfect {10 1 0}
Mohs Hardness
3.5-45.5-6
2
10
👆🏻
Chemical Composition
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)