Origin
Southern and central Africa
Canada, Southern and central Africa
Color
Violet, Black
Colorless, White, gray, pink, Green
Streak
gray, White
White
For which Rashi?
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-
Planet
-
-
Element of Planets
-
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
-
-
Not to wear with
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-
Powers
-
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.172.74-2.90
1
7.18
👆🏻
Fracture
-
Uneven, Splintery
Cleavage
None
Perfect on {100} and {001}
Mohs Hardness
74.5-5
2
10
👆🏻
Chemical Composition
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.
Luster
Vitreous
Silky
Pleochroism
Strong: pale lavender dark blueAnthony et al
-
Dispersion
0.020.01
0.005
1
👆🏻
Transparency
TranslucentAnthony et al, Translucent
Transparent
Refractive Index
-99991.595-1.645
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Triclinic
Birefringence
-99990.028-0.038
0
0.296
👆🏻
Clarity
TranslucentAnthony et al
Transparent
Physical
Neurological
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Cardiovascular
-
-
Respiratory
-
Good
Reproductive
-
-
Digestive
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-
Psychology
Empowerment
Healing
Healing
Emotional healing
Emotional healing
Qualities Associated
Emotional Healing
Healing