1 Astrology
2.1 Origin
Sri Lanka
Afghanistan, Southern and central Africa
2.4 Color
Blue
Blue, Greenish, Violet
2.7 Streak
Not Available
Blue, White
2.10 For which Rashi?
Sagittarius, Scorpio
Not Available
2.13 Planet
2.16 Element of Planets
Not Available
Not Available
2.19 Energy
2.22 How to Wear?
2.23.1 Finger
Not Available
Not Available
2.23.4 Ring Metal
Not Available
Not Available
2.25 Deities
2.28 Not to wear with
Not Available
Not Available
2.31 Powers
2.34 Birthstone
2.35.1 Planetary
Not Available
Not Available
2.35.4 Talisman
Not Available
Not Available
4 Physical Properties
4.1 Tenacity
5.4 Solubility
5.7 Durability
Not Available
Not Available
5.10 Specific Gravity
5.14 Fracture
ConchoidalArthur Thomas, Gemstones (2009)
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
5.17 Cleavage
None, but may exhibit slight parting
Imperfect on {110}
5.19 Mohs Hardness
5.22 Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
7 Optical Properties
7.2 Luster
7.4 Pleochroism
AbsentWalter Schumann
Not Available
7.6 Dispersion
8.6 Transparency
Gemmological Tables (2004)
Gemmological Tables (2004) More from other references
8.7 Refractive Index
8.11 Optic Character
Not Available
Not Available
8.12 Crystal System
8.13 Birefringence
Not AvailableNot Available
0
0.296
9.5 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Gemmological Tables (2004) More from other references
10 Benefits
10.1 Physical
10.1.1 Neurological
Not Available
Not Available
10.1.2 Cardiovascular
Not Available
Not Available
10.1.3 Respiratory
Not Available
Not Available
10.1.4 Reproductive
Not Available
Not Available
10.1.5 Digestive
Not Available
Not Available
10.2 Psychology
Not Available
Not Available
10.4 Healing
Not Available
Not Available
10.5 Qualities Associated
Not Available
Not Available