Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.645.05-5.22
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Uneven
Cleavage
Absent
None
Mohs Hardness
6.5-75.5-6
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)