Origin
Australia, Brazil, Canada, Colombia, Madagascar, Zimbabwe
Colombia, Zambia, Brazil, Madagascar, Southern and central Africa, Zimbabwe, Russia, India, Pakistan, Australia, USA, Mexico, Spain
Color
Brown
Green, Blue, Yellow, Grey
Streak
Brownish, Red, Black
White
For which Rashi?
-
Taurus, Gemini, Aries
Planet
-
Venus, Mercury
Element of Planets
-
Earth
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
Gold
Deities
-
Diana, Artemis, Venus, Freyja
Not to wear with
-
Red Coral, Natural Pearl, Moonstone, Ruby
Powers
-
Protection, Love, Courage
Birthstone
Planetary
-
Taurus
Talisman
-
Gemini
Tenacity
-
-
Solubility
-
-
Durability
-
Hard
Specific Gravity
5.22.67-2.78
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven, ConchoidalWalter Schumann
Cleavage
Good in one direction
Imperfect on the [0001]
Mohs Hardness
6-6.57.5-8
2
10
👆🏻
Chemical Composition
(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
Be3Al2SiO6
Luster
Resinous
Vitreous
Pleochroism
-
Strong dichroism: yellow green Lazzarelli
Dispersion
0.030.01
0.005
1
👆🏻
Transparency
TransparentWalter Schumann
Transparent, Translucent, Transparent to translucent
Refractive Index
2.190-2.4571.565-1.602
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Orthorhombic
Hexagonal
Birefringence
0.0830.0040-0.0070
0
0.296
👆🏻
Clarity
TransparentWalter Schumann
-