Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.003.70-3.90
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Conchoidal
Cleavage
None
Perfect on {011}, fair on {100}, poor on {110}
Mohs Hardness
5-5.53.5-4
2
10
👆🏻
Chemical Composition
CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references