Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.65-4.555.5
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
None, but may exhibit slight parting
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
7.5-85-5.5
2
10
👆🏻
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references