Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.95-4.10-9999
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
{110} Perfect, {110} Perfect, {110} Perfect
None
Mohs Hardness
3.5-47-7.5
2
10
👆🏻
Chemical Composition
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 4(Ta,Nb) 3(O,OH,F) 14Ulrich Henn and Claudio C.