Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.52.70-2.75
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
From the Greek for luster, for its pearly luster on the cleavage.
Mohs Hardness
5-5.54.5-5
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)