1 Astrology
1.1 Origin
Brazil, Southern and central Africa
Sri Lanka
1.2 Color
Blue, Green, Black
Black, Brownish, Reddish, Brown, Red, Yellow, White, Colorless, Brown, Brownish, Black, Colorless, Green, gray
1.3 Streak
White
White, Brownish, Brownish, White
1.4 For which Rashi?
Gemini, Sagittarius, Gemini, Sagittarius, Gemini, Sagittarius
Not Available
1.5 Planet
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
1.9 Deities
1.10 Not to wear with
Not Available
Not Available
1.11 Powers
Not Available
Not Available
1.12 Birthstone
1.12.1 Planetary
Not Available
Not Available
1.12.2 Talisman
Not Available
Not Available
2 Physical Properties
2.1 Tenacity
2.2 Solubility
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
3.04-3.176.86-7.03
1
7.18
2.5 Fracture
Uneven, Uneven, Gemstones of the world (2001) More from other references
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Irregular
2.6 Cleavage
{001} Indistinct, {???} Indistinct
{100} imperfect, {110} indistinct; partings on {111} or {011}
2.7 Mohs Hardness
2.8 Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3 Optical Properties
3.1 Luster
Not Available
Adamantine, Greasy
3.2 Pleochroism
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
Pleochroic haloes have been observed. Dichroic in yellow
3.3 Dispersion
3.4 Transparency
Transparent, Translucent
Transparent, Translucent
3.5 Refractive Index
1.604-1.6461.990-2.105
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
0.031-0.0360.096-0.098
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