1 Astrology
1.1 Origin
Italy, Canada
Tanzania, Madagascar, Kenya, Sri Lanka, Burma, Australia
1.2 Color
Blue, Red, Yellow, Colorless, Blue, Colorless, Green, Yellow, White, Blue, Colorless, Green, Yellow, White
Green, Brown, Colorless, Greenish, Yellow
1.3 Streak
1.4 For which Rashi?
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1.5 Planet
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1.6 Element of Planets
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1.7 How to Wear?
1.7.1 Finger
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1.7.2 Ring Metal
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1.8 Energy
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1.9 Deities
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1.10 Not to wear with
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1.11 Powers
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1.12 Birthstone
1.12.1 Planetary
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1.12.2 Talisman
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2 Physical Properties
2.1 Tenacity
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2.2 Solubility
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2.3 Durability
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2.4 Specific Gravity
2.90-3.103.25-3.45
1
7.18
2.5 Fracture
Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Uneven
2.6 Cleavage
Poor/indistinct on {1120} and {1011}
Good on {110}
2.7 Mohs Hardness
2.8 Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Pale green
X = colorless to green; Y = colorless
3.3 Dispersion
3.4 Transparency
Transparent
Gemmological Tables (2004) More from other references
3.5 Refractive Index
1.614-1.6661.660-1.685
1
3.25
3.6 Optic Character
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3.7 Crystal System
3.8 Birefringence
0.014-0.0320.012-0.017
0
0.296
3.9 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
2 Benefits
2.1 Physical
2.1.1 Neurological
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2.2.1 Cardiovascular
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2.2.2 Respiratory
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2.3.1 Reproductive
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2.4.1 Digestive
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2.5 Psychology
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2.6 Healing
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2.7 Qualities Associated
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