1 Astrology
1.1 Origin
Sri Lanka, Southern and central Africa
Southern and central Africa
1.2 Color
Blue
Colorless, Brown, Greenish, gray
1.3 Streak
1.4 For which Rashi?
Not Available
Not Available
1.5 Planet
Not Available
Not Available
1.6 Element of Planets
Not Available
Not Available
1.7 How to Wear?
1.7.1 Finger
Not Available
Not Available
1.7.2 Ring Metal
Not Available
Not Available
1.8 Energy
Not Available
Not Available
1.9 Deities
Not Available
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1.10 Not to wear with
Not Available
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1.11 Powers
Not Available
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1.12 Birthstone
1.12.1 Planetary
Not Available
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1.12.2 Talisman
Not Available
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2 Physical Properties
2.1 Tenacity
Not Available
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2.2 Solubility
Not Available
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2.3 Durability
Not Available
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2.4 Specific Gravity
3.95-4.102.62-2.67
1
7.18
2.5 Fracture
Not Available
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven
2.6 Cleavage
Not Available
From the Greek, oligos and kasein, little cleavage.
2.7 Mohs Hardness
2.8 Chemical Composition
Al 2O 3Ulrich Henn and Claudio C.
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Not Available
Not Available
3.3 Dispersion
3.4 Transparency
Transparent, Translucent
Gemmological Tables (2004)
3.5 Refractive Index
1.757-1.7801.538-1.550
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
Not Available
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3.8 Birefringence
3.9 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
4 Benefits
4.1 Physical
4.1.1 Neurological
Not Available
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4.1.2 Cardiovascular
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4.1.3 Respiratory
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4.1.4 Reproductive
Not Available
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4.1.5 Digestive
Not Available
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4.2 Psychology
Not Available
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4.3 Healing
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4.4 Qualities Associated
Not Available
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