Tenacity
-
-
Solubility
insoluble in water
-
Durability
-
-
Specific Gravity
2.51-2.635.5
1
7.18
👆🏻
Fracture
Fibrous
Conchoidal
Cleavage
Perfect basal
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
2.5-4.55-5.5
2
10
👆🏻
Chemical Composition
Mg 3(Si 2O 5)(OH) 4Gemdat.org , Management Team (2012)
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references