Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.52.71-2.72
1
7.18
👆🏻
Fracture
Conchoidal
Fibrous
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
{???} Good
Mohs Hardness
5-5.56-6.5
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)