Tenacity
-
-
Solubility
-
Soluble
Durability
-
-
Specific Gravity
4.00-4.623.06-3.25
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Sub-Conchoidal, Conchoidal, Uneven
Cleavage
Indistinct parting on [111]
Poor/indistinct on {100}
Mohs Hardness
7.5-84.5-5
2
10
👆🏻
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)