Origin
Brazil, Southern and central Africa
Brazil, USA, Madagascar, Sri Lanka, Burma, Thailand, Cambodia, Afghanistan, Russia
Color
Blue, Green, Black
Blue, Violet, Colorless, Red, Green, Brown
Streak
White
White
For which Rashi?
Gemini, Sagittarius
Sagittarius, Scorpio
Planet
Jupiter
Pluto
Element of Planets
-
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
-
Hephaestus
Not to wear with
-
-
Powers
-
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.04-3.173.64-3.66
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, Uneven
Cleavage
{001} Indistinct, {???} Indistinct
None, but may exhibit slight parting
Mohs Hardness
5.58
2
10
👆🏻
Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
MgAl2O4
Luster
-
Vitreous
Pleochroism
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
Absent
Dispersion
0.010.02
0.005
1
👆🏻
Transparency
Transparent, Translucent
Transparent, Translucent, Transparent to translucent
Refractive Index
1.604-1.6461.73
1
3.25
👆🏻
Optic Character
-
-
Crystal System
monoclinic
Isometric
Birefringence
0.031-0.036-9999
0
0.296
👆🏻
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
Physical
Neurological
Balances digestive system and reduces bloating
-
Cardiovascular
-
-
Respiratory
Excellent
Good
Reproductive
-
-
Digestive
Supports digestive health
-
Psychology
Clarity
Revitalization
Healing
Emotional healing
Emotional healing
Qualities Associated
Psychic Abilities
Vitality