Origin
Southern and central Africa
China, Canada
Color
Brown, Reddish, pink, orange
Green, Yellow, Brown, White, gray, Black
Specific Gravity
3.82-4.00
2.90-3.10
Fracture
-
Splintery, Granular
Cleavage
{???} Indistinct
None
Chemical Composition
Mn2+9(SiO 4) 4(OH,F) 2Anthony et al , Handbook of mineralogy (2001)
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
Luster
Vitreous
Vitreous, Greasy
Transparency
TransparentAnthony et al
Translucent
Refractive Index
1.763-1.793
1.600-1.627
Crystal System
-
monoclinic
Birefringence
-9999
0.027
Clarity
TransparentAnthony et al
Translucent
Neurological
-
Aids in mental clarity and focus
Psychology
-
Emotional Balance
Healing
Physical healing
Physical healing
Qualities Associated
Harmony
Healing