Origin
Southern and central Africa
Tanzania, Madagascar, Kenya, Sri Lanka, Burma, Australia
Color
Blue, Violet, Brown, White, Greenish, pink
Green, Brown, Colorless, Greenish, Yellow
Streak
White
White
For which Rashi?
Leo, Sagittarius
-
Planet
Saturn
-
Element of Planets
Water
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
Isis
-
Not to wear with
-
-
Powers
Healing
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.26-3.413.25-3.45
1
7.18
👆🏻
Fracture
Fibrous, ConchoidalWalter Schumann
Conchoidal, Uneven
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Good on {110}
Mohs Hardness
7-8.56.5
2
10
👆🏻
Chemical Composition
AlAl6O3BSi3O18
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Luster
Vitreous
Vitreous
Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
X = colorless to green; Y = colorless
Dispersion
0.010.02
0.005
1
👆🏻
Transparency
Translucent, Translucent to opaque
-
Refractive Index
1.669-1.7231.660-1.685
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.011-0.0370.012-0.017
0
0.296
👆🏻
Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda
Physical
Neurological
Enhances mental clarity and focus
-
Cardiovascular
-
-
Respiratory
Good
-
Reproductive
-
-
Digestive
-
-
Psychology
Patience
Harmony
Healing
Emotional healing
Emotional healing
Qualities Associated
Patience
Self-worth