Origin
Australia, Brazil, Canada, Colombia, Madagascar, Zimbabwe
-
Color
Brown
Blue, Green
Streak
Brownish, Red, Black
Blue
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
5.23.80-4.15
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven
Cleavage
Good in one direction
perfect along [010] and [100]
Mohs Hardness
6-6.53.5-4
2
10
👆🏻
Chemical Composition
(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Resinous
Silky
Pleochroism
-
X = very pale blue; Y = pale blue; Z = deep blue
Dispersion
0.030.02
0.005
1
👆🏻
Transparency
TransparentWalter Schumann
Translucent
Refractive Index
2.190-2.4571.752-1.815
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.0830.063
0
0.296
👆🏻
Clarity
TransparentWalter Schumann
Translucent
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
-
Good
Reproductive
-
-
Digestive
-
-
Psychology
Strength
Communication
Healing
Emotional healing
Emotional healing
Qualities Associated
Balance
Communication