Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.08-2.165.5
1
7.18
👆🏻
Fracture
Irregular/uneven
Conchoidal
Cleavage
distinct/good on {1011}
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
4.55-5.5
2
10
👆🏻
Chemical Composition
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references