Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.05-5.222.60-2.64
1
7.18
👆🏻
Fracture
Uneven
Uneven, Splintery, Conchoidal
Cleavage
None
Absent
Mohs Hardness
5.5-66.5-7
2
10
👆🏻
Chemical Composition
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
SiO 2Arthur Thomas , Gemstones (2009)