Origin
Australia, Brazil, Canada, Colombia, Madagascar, Zimbabwe
Southern and central Africa
Color
Brown
Violet, Black
Streak
Brownish, Red, Black
gray, White
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
-
-
Durability
-
-
Specific Gravity
5.23.17
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
-
Cleavage
Good in one direction
None
Mohs Hardness
6-6.57
2
10
👆🏻
Chemical Composition
(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
Luster
Resinous
Vitreous
Pleochroism
-
Strong: pale lavender dark blueAnthony et al
Dispersion
0.030.02
0.005
1
👆🏻
Transparency
TransparentWalter Schumann
TranslucentAnthony et al, Translucent
Refractive Index
2.190-2.457-9999
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Orthorhombic
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Birefringence
0.083-9999
0
0.296
👆🏻
Clarity
TransparentWalter Schumann
TranslucentAnthony et al
Physical
Neurological
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-
Cardiovascular
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-
Respiratory
-
-
Reproductive
-
-
Digestive
-
-
Psychology
Strength
Empowerment
Healing
Emotional healing
Emotional healing
Qualities Associated
Balance
Emotional Healing