1 Astrology
1.1 Origin
Southern and central Africa
Australia
1.2 Color
Yellow, Green, Blue, Violet
Green, Blue
1.3 Streak
1.4 For which Rashi?
Not Available
Cancer, Gemini, Cancer, Gemini, Cancer, Gemini
1.5 Planet
1.6 Element of Planets
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
Not Available
Protection, Love, Money
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
3.90-4.052.60-2.85
1
7.18
2.5 Fracture
Not Available
Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)
2.6 Cleavage
2.7 Mohs Hardness
Not Available2.5-4.5
2
10
2.8 Chemical Composition
Al 2O 3Ulrich Henn and Claudio C.
Not Available
3 Optical Properties
3.1 Luster
3.2 Pleochroism
Not Available
AbsentWalter Schumann
3.3 Dispersion
3.4 Transparency
Transparent, Translucent
Translucent, Opaque
3.5 Refractive Index
1.758-1.7801.52-1.66
1
3.25
3.6 Optic Character
Not Available
Not Available
3.7 Crystal System
Not Available
Orthorhombic
3.8 Birefringence
3.9 Clarity
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