Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.76-5.032.60-2.64
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Splintery, Conchoidal
Cleavage
None
Absent
Mohs Hardness
5.5-6.56.5-7
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
SiO 2Arthur Thomas , Gemstones (2009)