Origin
Southern and central Africa
Linares, Jaén, Andalusia, Spain
Color
Black, Brownish, Brown
Blue
Streak
Brown
Blue
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
-
-
Durability
-
-
Specific Gravity
4.5-4.85.35
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
None, parting may develop along {111}
Perfect on {100}, imperfect on {001}
Mohs Hardness
5.52.5
2
10
👆🏻
Chemical Composition
Fe++Cr2O4
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
-
Sub-Adamantine, Vitreous
Pleochroism
none.
X = pale blue; Y = blue; Z = Prussian blue
Dispersion
0.040.05
0.005
1
👆🏻
Transparency
-
Transparent
Refractive Index
2.08-2.161.809-1.859
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Isometric
monoclinic
Birefringence
-99990.050
0
0.296
👆🏻
Clarity
-
Transparent
Physical
Neurological
-
-
Cardiovascular
-
-
Respiratory
Poor
Good
Reproductive
-
-
Digestive
-
Supports digestive health
Psychology
Vitality
Self-Expression
Healing
Emotional healing
Emotional healing
Qualities Associated
Protection
Communication