Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.52.20-2.80
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Perfect
Mohs Hardness
5-5.5-9999
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mg 3Si 4O 10(OH) 2Gemdat.org , Management Team (2012)