Tenacity
-
Brittle
Solubility
-
insoluble
Durability
-
-
Specific Gravity
3.08-3.126.86-7.03
1
7.18
👆🏻
Fracture
ConchoidalWalter Schumann
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
{010} Perfect
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
7.56-7
2
10
👆🏻
Chemical Composition
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references