1 Astrology
1.1 Origin
Brazil, Colombia, Southern and central Africa
USA, Mexico
1.2 Color
Greenish, Blue, Colorless, White, Green
Green, Brown, Greenish, Brown, Green, Green, Black
1.3 Streak
White
Greenish, gray, Greenish, gray
1.4 For which Rashi?
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1.5 Planet
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1.6 Element of Planets
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1.7 How to Wear?
1.7.1 Finger
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1.7.2 Ring Metal
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1.8 Energy
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1.9 Deities
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1.10 Not to wear with
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1.11 Powers
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1.12 Birthstone
1.12.1 Planetary
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1.12.2 Talisman
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2 Physical Properties
2.1 Tenacity
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2.2 Solubility
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2.3 Durability
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2.4 Specific Gravity
3.08-3.123.19-3.56
1
7.18
2.5 Fracture
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle, Metallic
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
2.6 Cleavage
{010} Perfect
{110} Perfect, {010} Indistinct
2.7 Mohs Hardness
2.8 Chemical Composition
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
3 Optical Properties
3.1 Luster
Vitreous
Vitreous, Resinous
3.2 Pleochroism
Weak: colorless-(greenish) yellow
Pale green
3.3 Dispersion
3.4 Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent
3.5 Refractive Index
1.650-1.6771.671-1.774
1
3.25
3.6 Optic Character
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3.7 Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c
3.8 Birefringence
0.019-0.025Not Available
0
0.296
3.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent
4 Benefits
4.1 Physical
4.1.1 Neurological
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4.1.2 Cardiovascular
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4.1.3 Respiratory
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4.1.4 Reproductive
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4.1.5 Digestive
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4.2 Psychology
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4.3 Healing
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4.4 Qualities Associated
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