Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.44-2.625.5
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
Indiscernible
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
2.5-5.55-5.5
2
10
👆🏻
Chemical Composition
H 4Mg 3Si 2O 9Walter Schumann , Gemstones of the world (2001) More from other references
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references