Origin
Switzerland
Brazil, Southern and central Africa
Color
Brown, Brownish, Yellow, Black, Reddish
Blue, Green, Black
Streak
White, gray
White
For which Rashi?
-
Gemini, Sagittarius
Planet
-
Jupiter
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
3.7-3.83.04-3.17
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven
Cleavage
Distinct on {010}
{001} Indistinct, {???} Indistinct
Mohs Hardness
7-7.55.5
2
10
👆🏻
Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Luster
Resinous
-
Pleochroism
X = colorless; Y = pale yellow; Z = golden yellow
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
Dispersion
0.020.01
0.005
1
👆🏻
Transparency
-
Transparent, Translucent
Refractive Index
1.736-1.7621.604-1.646
1
3.25
👆🏻
Optic Character
-
-
Crystal System
monoclinic
monoclinic
Birefringence
0.009-0.0150.031-0.036
0
0.296
👆🏻
Clarity
-
Transparent
Physical
Neurological
Enhances mental clarity and focus
Balances digestive system and reduces bloating
Cardiovascular
-
-
Respiratory
Good
Excellent
Reproductive
-
-
Digestive
-
Supports digestive health
Psychology
Protection
Clarity
Healing
Physical healing
Emotional healing
Qualities Associated
Protection
Psychic Abilities