1 Astrology
1.1 Origin
Brazil, Colombia, Southern and central Africa
Southern and central Africa
1.4 Color
Greenish, Blue, Colorless, White, Green
Colorless, Greenish, Colorless, Green, gray, Yellow
1.6 Streak
1.8 For which Rashi?
Not Available
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1.10 Planet
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1.12 Element of Planets
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1.14 How to Wear?
1.14.2 Finger
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1.14.4 Ring Metal
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1.16 Energy
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1.18 Deities
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1.20 Not to wear with
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1.22 Powers
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1.23 Birthstone
1.24.1 Planetary
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1.24.2 Talisman
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2 Physical Properties
3.1 Tenacity
3.3 Solubility
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3.5 Durability
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3.7 Specific Gravity
3.08-3.123.21-3.38
1
7.18
3.12 Fracture
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle, Metallic
Irregular/uneven, Uneven
3.13 Cleavage
{010} Perfect
Perfect on {001}
3.14 Mohs Hardness
4.4 Chemical Composition
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2Al 3(SiO 4) 3(OH)Walter Schumann , Gemstones of the world (2001) More from other references
5 Optical Properties
5.1 Luster
5.2 Pleochroism
Weak: colorless-(greenish) yellow
StrongArthur Thomas
5.3 Dispersion
5.6 Transparency
Gemmological Tables (2004) More from other references
Transparent
5.7 Refractive Index
1.650-1.6771.670-1.734
1
3.25
5.11 Optic Character
Not Available
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5.12 Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
monoclinic
5.13 Birefringence
0.019-0.0250.006-0.011
0
0.296
6.5 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent
7 Benefits
7.1 Physical
7.1.1 Neurological
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7.1.2 Cardiovascular
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7.1.3 Respiratory
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7.1.4 Reproductive
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7.1.5 Digestive
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7.2 Psychology
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7.3 Healing
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7.4 Qualities Associated
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