1 Astrology
1.1 Origin
Tanzania, Madagascar, Kenya, Sri Lanka, Burma, Australia
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1.2 Color
Green, Brown, Colorless, Greenish, Yellow
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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
3.25-3.453.29-3.33
1
7.18
2.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Uneven
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
2.6 Cleavage
Good on {110}
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2.7 Mohs Hardness
2.8 Chemical Composition
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
(Ca,Ce) 4 Na(Na,Ca) 2 Ti(Si 2 O 7 ) 2 F 2 (O,F) 2 Michael O’Donoghue, Gems, Sixth Edition (2006)
3 Optical Properties
3.1 Luster
3.2 Pleochroism
X = colorless to green; Y = colorless
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3.3 Dispersion
3.4 Transparency
Gemmological Tables (2004) More from other references
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3.5 Refractive Index
1.660-1.6851.653-1.662
1
3.25
3.6 Optic Character
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3.7 Crystal System
Orthorhombic
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3.8 Birefringence
0.012-0.017Not Available
0
0.296
3.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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2 Benefits
2.2 Physical
2.2.1 Neurological
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2.2.2 Cardiovascular
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2.3.1 Respiratory
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2.3.2 Reproductive
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2.3.3 Digestive
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2.4 Psychology
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2.5 Healing
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2.6 Qualities Associated
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