Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.76-5.033.1-3.2
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
None
Vitreous, pearly on cleavage
Mohs Hardness
5.5-6.53-4
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references