Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.53.17-3.24
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
(0001) indistinct
Mohs Hardness
5-5.59-9.5
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiCArthur Thomas , Gemstones (2009)