Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.43-3.445.5
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
None Observed
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
6.5-75-5.5
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references