Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.50-5.902.74-2.76
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
On {10 1 0}, perfect; parting on {000 1 }
{010} Perfect, {001} Distinct
Mohs Hardness
43.5-4
2
10
👆🏻
Chemical Composition
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)