Tenacity
-
Brittle
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
5.55.00-5.20
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal, ConchoidalWalter Schumann
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Indistinct on {001}; partings on {011} and {111}
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
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references