1 Astrology
1.1 Origin
Sri Lanka
Not Available, Southern and central Africa
1.2 Color
1.3 Streak
Not Available
gray, White, gray, White
1.4 For which Rashi?
Sagittarius, Scorpio
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
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
2.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009)
Handbook of mineralogy (2001)
2.6 Cleavage
None, but may exhibit slight parting
None
2.7 Mohs Hardness
2.8 Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
3 Optical Properties
3.1 Luster
3.2 Pleochroism
AbsentWalter Schumann
Strong: pale lavender dark blueAnthony et al
3.3 Dispersion
3.4 Transparency
Gemmological Tables (2004)
TranslucentAnthony et al, Translucent
3.5 Refractive Index
1.735-1.790Not Available
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
Isometric
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
3.8 Birefringence
Not AvailableNot Available
0
0.296
3.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TranslucentAnthony et al
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
Not Available
4.1.4 Reproductive
Not Available
Not Available
4.1.5 Digestive
Not Available
Not Available
4.2 Psychology
Not Available
Not Available
4.3 Healing
Not Available
Not Available
4.4 Qualities Associated
Not Available
Not Available