Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.53.04-3.26
1
7.18
👆🏻
Fracture
Conchoidal
Splintery, Uneven
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
{110} perfect
Mohs Hardness
5-5.55-6
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)