1 Astrology
1.1 Origin
Brazil, Southern and central Africa
Southern and central Africa
1.2 Color
Blue, Green, Black
Not Available
1.3 Streak
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
Not Available
Not Available
2.2 Solubility
Not Available
Not Available
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
3.04-3.173.62-4.33
1
7.18
2.5 Fracture
Uneven, Uneven, Gemstones of the world (2001) More from other references
Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)
2.6 Cleavage
{001} Indistinct, {???} Indistinct
Not Available
2.7 Mohs Hardness
2.8 Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
3 Optical Properties
3.1 Luster
Not Available
Not Available
3.2 Pleochroism
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
Not Available
3.3 Dispersion
3.4 Transparency
Transparent, Translucent
TransparentGemdat.org, Management Team (2012)
3.5 Refractive Index
1.604-1.6461.730-1.820
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
3.8 Birefringence
0.031-0.036Not Available
0
0.296
3.9 Clarity
Transparent
TransparentGemdat.org
4 Benefits
4.1 Physical
4.1.1 Neurological
Not Available
Not Available
4.1.2 Cardiovascular
Not Available
Not Available
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