Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.52.00-2.45
1
7.18
👆🏻
Fracture
Conchoidal
Sub-Conchoidal, Conchoidal
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
none
Mohs Hardness
5-5.52-4
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cu2H2Si2O5(OH)4