Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.76-5.033.19-3.56
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
None
{110} Perfect, {010} Indistinct
Mohs Hardness
5.5-6.55.5-6
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)