Origin
India, Southern and central Africa, Madagascar
Madagascar
Color
Black, Brownish, Greenish
Red, Colorless, Yellow, White
Streak
Brown
White
For which Rashi?
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Planet
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Element of Planets
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Energy
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How to Wear?
Finger
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Ring Metal
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Deities
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Not to wear with
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Powers
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Birthstone
Planetary
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Talisman
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Tenacity
-
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Solubility
-
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Durability
-
-
Specific Gravity
3.18-3.223.34-3.44
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
{1011} Indistinct
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
-99998-8.5
2
10
👆🏻
Chemical Composition
Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
(K,Cs)Al 4Be 4(B,Be) 12O 28Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous
Adamantine
Pleochroism
Very strong: yellow-brown pale yellow
-
Dispersion
0.020.02
0.005
1
👆🏻
Transparency
Transparent, Translucent
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Refractive Index
1.635-1.6721.684-1.694
1
3.25
👆🏻
Optic Character
-
-
Crystal System
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-
Birefringence
0.025-9999
0
0.296
👆🏻
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
Physical
Neurological
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Cardiovascular
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Respiratory
Good
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Reproductive
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Digestive
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Psychology
Protection
Creativity
Healing
Emotional healing
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Qualities Associated
Protection & Grounding
Energy Amplification