Origin
Southern and central Africa
Australia
Color
Violet, Black
Brown, Reddish, Brownish, Yellow
Streak
gray, White
Brown, Brownish, Yellow
For which Rashi?
-
-
Planet
-
-
Element of Planets
-
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
-
-
Not to wear with
-
-
Powers
-
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
-
-
Solubility
-
HCl soluble
Durability
-
-
Specific Gravity
3.174.27-4.29
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
None
Perfect {010}
Mohs Hardness
75-5.5
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)
FeO(OH)Arthur Thomas , Gemstones (2009)
Luster
Vitreous
Adamantine
Pleochroism
Strong: pale lavender dark blueAnthony et al
VisibleArthur Thomas
Dispersion
0.020.05
0.005
1
👆🏻
Transparency
TranslucentAnthony et al, Translucent
-
Refractive Index
-99992.26-2.398
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Orthorhombic
Birefringence
-99990.138
0
0.296
👆🏻
Clarity
TranslucentAnthony et al
-
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
-
-
Reproductive
-
-
Digestive
-
-
Psychology
Empowerment
Creativity
Healing
Emotional healing
Emotional healing
Qualities Associated
Emotional Healing
Emotional Healing