Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.80-4.152.60-2.65
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal
Cleavage
perfect along [010] and [100]
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
3.5-46-6.5
2
10
👆🏻
Chemical Composition
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)