Tenacity
Brittle
Brittle
Solubility
Soluble
insoluble
Durability
-
-
Specific Gravity
3.25-3.356.86-7.03
1
7.18
👆🏻
Fracture
Conchoidal, ConchoidalWalter Schumann
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
Perfect in three directions
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
56-7
2
10
👆🏻
Chemical Composition
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references