Origin
Southern and central Africa
Tanzania, Madagascar, Kenya, Sri Lanka, Burma, Australia
Color
White, Colorless, Blue, Red, Green, Yellow, Violet, Black
Green, Brown, Colorless, Greenish, Yellow
Streak
Colorless
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
-
-
Durability
-
-
Specific Gravity
3.03-3.183.25-3.45
1
7.18
👆🏻
Fracture
Uneven, Irregular, Conchoidal
Conchoidal, Uneven
Cleavage
{???} Indistinct
Good on {110}
Mohs Hardness
7-7.56.5
2
10
👆🏻
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Luster
Vitreous
Vitreous
Pleochroism
Very strong: pale yellow colorless
X = colorless to green; Y = colorless
Dispersion
0.020.02
0.005
1
👆🏻
Transparency
Transparent
-
Refractive Index
1.614-1.6661.660-1.685
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Orthorhombic
Birefringence
0.014-0.0320.012-0.017
0
0.296
👆🏻
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
Physical
Neurological
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Cardiovascular
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Respiratory
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Reproductive
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Digestive
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Psychology
Self-acceptance
Harmony
Healing
Emotional healing
Emotional healing
Qualities Associated
Self-Exploration
Self-worth