Origin
Burma, Sri Lanka, India, Madagascar, Kenya, Tanzania, Thailand, Cambodia, China, Australia, USA
Brazil, Colombia, Southern and central Africa
Color
Colorless, Yellow, Green, Violet, White, Blue, Red, pink
Greenish, Blue, Colorless, White, Green
Streak
-
White
For which Rashi?
Pisces, Taurus, Gemini, Libra
-
Planet
Saturn
-
Element of Planets
Water
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
Apollo
-
Not to wear with
-
-
Powers
Psychic Power
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
-
-
Solubility
insoluble
-
Durability
-
-
Specific Gravity
3.95-4.033.08-3.12
1
7.18
👆🏻
Fracture
Uneven
ConchoidalWalter Schumann
Cleavage
None, but may exhibit parting
{010} Perfect
Mohs Hardness
97.5
2
10
👆🏻
Chemical Composition
Al 2 O 3
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous, Adamantine
Vitreous
Pleochroism
Strong
Weak: colorless-(greenish) yellow
Dispersion
0.020.02
0.005
1
👆🏻
Transparency
Transparent, Translucent, Transparent to opaque
-
Refractive Index
1.762-1.7881.650-1.677
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Trigonal
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
Birefringence
0.008-0.0090.019-0.025
0
0.296
👆🏻
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda