Tenacity
-
Brittle
Solubility
-
insoluble
Durability
-
-
Specific Gravity
3.43-3.446.86-7.03
1
7.18
👆🏻
Fracture
-
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
None Observed
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
6.5-76-7
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references