Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
1.98-2.255.5
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
None
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
5-6.55-5.5
2
10
👆🏻
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references