1 Astrology
1.1 Origin
Southern and central Africa
Sri Lanka
1.2 Color
White, Colorless, Blue, Red, Green, Yellow, Violet
Green, Red, Blue, Brown, pink
1.3 Streak
1.4 For which Rashi?
Not Available
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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
1.4 Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal
1.5 Cleavage
Not Available
{0001} Poor
1.6 Mohs Hardness
5.5-6.5Not Available
2
10
1.7 Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Ca(Li 2Al)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
2 Optical Properties
2.1 Luster
2.2 Pleochroism
AbsentWalter Schumann
Strong: dark brown light brownAnthony et al
2.4 Dispersion
2.8 Transparency
2.9 Refractive Index
1.37-1.52Not Available
1
3.25
2.11 Optic Character
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2.12 Crystal System
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2.13 Birefringence
Not AvailableNot Available
0
0.296
2.14 Clarity
3 Benefits
3.1 Physical
3.1.1 Neurological
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3.1.2 Cardiovascular
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3.1.3 Respiratory
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3.1.4 Reproductive
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3.1.5 Digestive
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3.2 Psychology
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3.3 Healing
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3.4 Qualities Associated
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