Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.55.06-5.08
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Subconchoidal, Conchoidal
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Poor on [111].
Mohs Hardness
5-5.53-3.25
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cu5FeS4