Color
Brown, Red, Black, Brownish
Yellow
Specific Gravity
5.05-5.22
2.05-2.08
Mohs Hardness
5.5-6
-9999
Chemical Composition
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
SWalter Schumann , Gemstones of the world (2001)
Transparency
Translucent
TranslucentWalter Schumann
Refractive Index
-9999
1.958-2.245
Crystal System
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
-
Birefringence
-9999
0.291
Clarity
Translucent
TranslucentWalter Schumann
Psychology
Creativity
Creativity
Healing
-
Emotional healing
Qualities Associated
Grounding
Vitality