Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.34-2.515.5
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
None
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
-99995-5.5
2
10
👆🏻
Chemical Composition
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references