Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.70-3.902.55-2.63
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Perfect on {011}, fair on {100}, poor on {110}
{001} Perfect, {010} Good
Mohs Hardness
3.5-46-6.5
2
10
👆🏻
Chemical Composition
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KAlSi 3O 8Arthur Thomas , Gemstones (2009)