Origin
Burma, Sri Lanka, India, Madagascar, Kenya, Tanzania, Thailand, Cambodia, China, Australia, USA
Brazil, Madagascar, Zimbabwe, Russia, Sri Lanka, India, Burma, Origins: Brazil
Color
Colorless, Yellow, Green, Violet, White, Blue, Red, pink
Greenish, Green, Brownish, Red, Blue, Brown, gray
Streak
-
White
For which Rashi?
Pisces, Taurus, Gemini, Libra
-
Planet
Saturn
-
Element of Planets
Water
Earth, Water
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
Apollo
-
Not to wear with
-
-
Powers
Psychic Power
Healing
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
-
Brittle
Solubility
insoluble
-
Durability
-
-
Specific Gravity
3.95-4.033.69-3.81
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal to uneven, ConchoidalWalter Schumann
Cleavage
None, but may exhibit parting
Distinct on {110}, imperfect on {010}, poor on {001}
Mohs Hardness
98.5
2
10
👆🏻
Chemical Composition
Al 2 O 3
BeAl 2 O 4
Luster
Vitreous, Adamantine
Vitreous
Pleochroism
Strong
X = red; Y = yellow-orange; Z = emerald-green
Dispersion
0.020.02
0.005
1
👆🏻
Transparency
Transparent, Translucent, Transparent to opaque
Transparent, Translucent, Transparent to translucent
Refractive Index
1.762-1.7881.746-1.763
1
3.25
👆🏻
Optic Character
-
Biaxial/+
Crystal System
Trigonal
Orthorhombic
Birefringence
0.008-0.0090.007-0.013
0
0.296
👆🏻
Clarity
Transparent
Transparent