1 Astrology
1.1 Origin
Brazil, Colombia, Southern and central Africa
Sri Lanka
1.2 Color
Greenish, Blue, Colorless, White, Green
Blue
1.3 Streak
1.4 For which Rashi?
Not Available
Sagittarius, Scorpio
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
1.10 Deities
2.2 Not to wear with
Not Available
Not Available
2.3 Powers
2.5 Birthstone
2.5.1 Planetary
Not Available
Not Available
2.6.1 Talisman
Not Available
Not Available
3 Physical Properties
3.1 Tenacity
Not Available
Not Available
3.2 Solubility
Not Available
Not Available
3.3 Durability
Not Available
Not Available
3.4 Specific Gravity
3.08-3.123.65-4.55
1
7.18
3.5 Fracture
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle, Metallic
ConchoidalArthur Thomas, Gemstones (2009)
3.6 Cleavage
{010} Perfect
None, but may exhibit slight parting
3.7 Mohs Hardness
3.13 Chemical Composition
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
4 Optical Properties
4.1 Luster
4.2 Pleochroism
Weak: colorless-(greenish) yellow
AbsentWalter Schumann
4.3 Dispersion
5.5 Transparency
Gemmological Tables (2004) More from other references
Gemmological Tables (2004)
5.6 Refractive Index
1.650-1.6771.735-1.790
1
3.25
5.7 Optic Character
Not Available
Not Available
5.8 Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
Isometric
5.9 Birefringence
0.019-0.025Not Available
0
0.296
5.10 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda
6 Benefits
6.1 Physical
6.1.1 Neurological
Not Available
Not Available
6.1.2 Cardiovascular
Not Available
Not Available
6.1.3 Respiratory
Not Available
Not Available
6.1.4 Reproductive
Not Available
Not Available
6.1.5 Digestive
Not Available
Not Available
6.2 Psychology
Not Available
Not Available
6.3 Healing
Not Available
Not Available
6.4 Qualities Associated
Not Available
Not Available