Origin
Canada, Southern and central Africa, Sri Lanka
Southern and central Africa
Color
Brown
Violet, Black
Streak
-
gray, White
For which Rashi?
-
-
Planet
-
-
Element of Planets
-
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
-
-
Not to wear with
Pearl, Moonstone
-
Powers
-
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.55-3.733.17
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
None
None
Mohs Hardness
7-7.57
2
10
👆🏻
Chemical Composition
Ca3Al2(SiO4)3
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
Luster
-
Vitreous
Pleochroism
-
Strong: pale lavender dark blueAnthony et al
Dispersion
0.030.02
0.005
1
👆🏻
Transparency
-
TranslucentAnthony et al, Translucent
Refractive Index
1.742-1.748-9999
1
3.25
👆🏻
Optic Character
-
-
Crystal System
-
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Birefringence
-9999-9999
0
0.296
👆🏻
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TranslucentAnthony et al
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
Good
-
Reproductive
-
-
Digestive
-
-
Psychology
Creativity
Empowerment
Healing
Physical healing
Emotional healing
Qualities Associated
Creativity
Emotional Healing