Origin
Kenya, Southern and central Africa
Southern and central Africa
Color
Green, Brown, Yellow, Red
Black, Reddish, gray, Red
Streak
-
Black, Brown, Reddish, Red
For which Rashi?
-
Aries, Aquarius
Planet
-
Saturn
Element of Planets
-
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
-
Mars
Not to wear with
-
-
Powers
-
Healing
Birthstone
Planetary
-
Talisman
-
-
Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.55-3.705.00-5.30
1
7.18
👆🏻
Fracture
-
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Perfect
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
4-76
2
10
👆🏻
Chemical Composition
Al 2SiO 5Arthur Thomas , Gemstones (2009) More from other references
Fe 2O 3Arthur Thomas , Gemstones (2009)
Luster
Vitreous
-
Pleochroism
Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli
O = brownish red; E = yellowish red
Dispersion
0.020.05
0.005
1
👆🏻
Transparency
Transparent
OpaqueHerve Nicolas Lazzarelli
Refractive Index
1.710-1.7352.690-3.220
1
3.25
👆🏻
Optic Character
Biaxial/+
-
Crystal System
-
Trigonal
Birefringence
0.012-0.0330.280
0
0.296
👆🏻
Clarity
Transparent
OpaqueHerve Nicolas Lazzarelli
Physical
Neurological
-
-
Cardiovascular
Supports heart health
Supports heart health
Respiratory
Good
Good
Reproductive
-
-
Digestive
-
-
Psychology
Intuition
Grounding
Healing
Emotional healing
Physical healing
Qualities Associated
Tranquility
Grounding