Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
5.53.30-3.50
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
5-5.55
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references