Origin
Southern and central Africa
Burma, Sri Lanka, India, Madagascar, Kenya, Tanzania, Thailand, Cambodia, China, Australia, USA
Color
Black, Reddish, gray, Red
Colorless, Yellow, Green, Violet, White, Blue, Red, pink
Streak
Black, Brown, Reddish, Red
-
For which Rashi?
Aries, Aquarius
Pisces, Taurus, Gemini, Libra
Planet
Saturn
Saturn
Element of Planets
-
Water
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
Mars
Apollo
Not to wear with
-
-
Powers
Healing
Psychic Power
Birthstone
Planetary
-
Talisman
-
-
Tenacity
Brittle
-
Solubility
-
insoluble
Durability
-
-
Specific Gravity
5.00-5.303.95-4.03
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Uneven
Cleavage
None, may show partings on {0001} and {10 1 1}
None, but may exhibit parting
Mohs Hardness
69
2
10
👆🏻
Chemical Composition
Fe 2O 3Arthur Thomas , Gemstones (2009)
Al 2 O 3
Luster
-
Vitreous, Adamantine
Pleochroism
O = brownish red; E = yellowish red
Strong
Dispersion
0.050.02
0.005
1
👆🏻
Transparency
OpaqueHerve Nicolas Lazzarelli
Transparent, Translucent, Transparent to opaque
Refractive Index
2.690-3.2201.762-1.788
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Trigonal
Trigonal
Birefringence
0.2800.008-0.009
0
0.296
👆🏻
Clarity
OpaqueHerve Nicolas Lazzarelli
Transparent