Origin
Southern and central Africa
USA
Color
Blue
Brown, Red, Black, Brownish
Specific Gravity
3.13-3.26
5.05-5.22
Fracture
Conchoidal
Uneven
Mohs Hardness
-9999
5.5-6
Chemical Composition
Ca 5(F,Cl)(PO 4) 3Arthur Thomas , Gemstones (2009)
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Transparency
-
Translucent
Refractive Index
1.628-1.651
-9999
Crystal System
-
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Birefringence
0.002-0.008
-9999
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent
Healing
Physical healing
-
Qualities Associated
Emotional Healing
Grounding