Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.56.50-7.00
1
7.18
👆🏻
Fracture
Conchoidal
Irregular, Conchoidal
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
On {011}, distinct; on {001}, {013}, indistinct
Mohs Hardness
5-5.53
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
PbMoO 4Walter Schumann , Gemstones of the world (2001)