1 Astrology
1.1 Origin
Sri Lanka
Southern and central Africa
1.4 Color
Red, Blue, Green, Brown, Black
Yellow, Green
1.5 Streak
1.7 For which Rashi?
Not Available
Not Available
1.9 Planet
Not Available
Not Available
1.11 Element of Planets
Not Available
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1.13 How to Wear?
1.14.1 Finger
Not Available
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1.14.3 Ring Metal
Not Available
Not Available
1.15 Energy
Not Available
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1.17 Deities
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1.19 Not to wear with
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1.21 Powers
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1.23 Birthstone
1.24.1 Planetary
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1.24.3 Talisman
Not Available
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2 Physical Properties
2.1 Tenacity
Not Available
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3.2 Solubility
3.4 Durability
Not Available
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3.6 Specific Gravity
3.8 Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Conchoidal, Uneven, Conchoidal, Gemstones of the world (2001)
3.11 Cleavage
3.12 Mohs Hardness
4.3 Chemical Composition
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references
Not Available
5 Optical Properties
5.2 Luster
5.3 Pleochroism
5.4 Dispersion
5.7 Transparency
Transparent, Translucent
Transparent, Translucent
5.8 Refractive Index
1.770-1.7801.518-1.570
1
3.25
5.12 Optic Character
Not Available
Not Available
5.13 Crystal System
Isometric
Triclinic or monoclinic
5.14 Birefringence
Not Available0.008-0.010
0
0.296
6.3 Clarity
7 Benefits
7.2 Physical
7.2.1 Neurological
Not Available
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7.2.2 Cardiovascular
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7.2.3 Respiratory
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7.2.4 Reproductive
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7.2.5 Digestive
Not Available
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7.3 Psychology
Not Available
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7.4 Healing
Not Available
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7.5 Qualities Associated
Not Available
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