1 Astrology
1.1 Origin
Brazil, Southern and central Africa
Burma, Sri Lanka, India, Madagascar, Kenya, Tanzania, Thailand, Cambodia, China, Australia, USA
1.2 Color
Blue, Green, Black
Colorless, Yellow, Green, Violet, White, Colorless, Blue, Red, Green, Yellow, pink
1.3 Streak
1.4 For which Rashi?
Gemini, Sagittarius, Gemini, Sagittarius, Gemini, Sagittarius
Pisces, Taurus, Gemini, Libra, Pisces, Taurus, Gemini, Libra, Pisces, Taurus, Gemini, Libra
1.5 Planet
1.6 Element of Planets
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
1.9 Deities
1.10 Not to wear with
Not Available
Not Available
1.11 Powers
Not Available
Psychic Power, Prosperity
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
Not Available
2.2 Solubility
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
3.04-3.173.95-4.03
1
7.18
2.5 Fracture
Uneven, Uneven, Gemstones of the world (2001) More from other references
Uneven, Uneven, Gems, Sixth Edition (2006)
2.6 Cleavage
{001} Indistinct, {???} Indistinct
None, but may exhibit parting
2.7 Mohs Hardness
2.8 Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Al 2 O 3
3 Optical Properties
3.1 Luster
Not Available
Vitreous, Adamantine, Vitreous, Adamantine
3.2 Pleochroism
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
Strong
3.3 Dispersion
3.4 Transparency
Transparent, Translucent
Transparent, Translucent, Transparent to opaque
3.5 Refractive Index
1.604-1.6461.762-1.788
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
0.031-0.0360.008-0.009
0
0.296
3.9 Clarity
4 Benefits
4.1 Physical
4.1.1 Neurological
Not Available
Not Available
4.1.2 Cardiovascular
Not Available
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4.1.3 Respiratory
Not Available
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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
Not Available
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4.4 Qualities Associated
Not Available
Not Available