Origin
Southern and central Africa
Sri Lanka
Color
Brown
Black, Brownish, Reddish, Brown, Red, Yellow, White, Colorless, Green, gray
Streak
White
White, Brownish
For which Rashi?
-
-
Planet
-
-
Element of Planets
-
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
-
-
Not to wear with
-
-
Powers
-
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
-
Brittle
Solubility
-
insoluble
Durability
-
-
Specific Gravity
3.25-3.286.86-7.03
1
7.18
👆🏻
Fracture
Uneven
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
{100} Distinct, {001} Poor, {110} Poor
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
6.5-76-7
2
10
👆🏻
Chemical Composition
Ca2Fe++Al2BO3Si4O12(OH)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous
Adamantine, Greasy
Pleochroism
Colorless
Pleochroic haloes have been observed. Dichroic in yellow
Dispersion
0.020.07
0.005
1
👆🏻
Transparency
Transparent
Transparent, Translucent
Refractive Index
1.674-1.6931.990-2.105
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Triclinic Pinacoidal H-M Symbol ( 1) Space Group: P1
tetragonal
Birefringence
-99990.096-0.098
0
0.296
👆🏻
Clarity
-
Transparent
Physical
Neurological
-
Enhances mental clarity and focus
Cardiovascular
-
Supports heart health
Respiratory
-
Poor
Reproductive
-
-
Digestive
-
-
Psychology
Grounding
Focus
Healing
Emotional healing
Emotional healing
Qualities Associated
-
Manifestation