Origin
USA
Brazil, Southern and central Africa
Color
Yellow, Red, Green, Colorless, orange
Blue, Green, Black
Streak
Yellow, yellowish orange
White
For which Rashi?
Not Available
Gemini, Sagittarius, Gemini, Sagittarius, Gemini, Sagittarius
Planet
Not Available
Jupiter
Element of Planets
Not Available
Not Available
Energy
Not Available
Projective
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Deities
Not Available
Gia
Not to wear with
Not Available
Not Available
Powers
Not Available
Not Available
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
5.50-5.90
3.04-3.17
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Uneven, Uneven, Gemstones of the world (2001) More from other references
Cleavage
On {10 1 0}, perfect; parting on {000 1 }
{001} Indistinct, {???} Indistinct
Chemical Composition
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Luster
Subadamantine, Resinous
Not Available
Pleochroism
Very weak
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
Transparency
TransparentRobert C. Kammerling, The Journal of Gemmology (1995) More from other references
Transparent, Translucent
Refractive Index
2.013-2.029
1.604-1.646
Optic Character
Not Available
Not Available
Crystal System
Hexagonal
monoclinic
Birefringence
0.016
0.031-0.036
Clarity
TransparentRobert C. Kammerling
Transparent
Neurological
Not Available
Not Available
Cardiovascular
Not Available
Not Available
Respiratory
Not Available
Not Available
Reproductive
Not Available
Not Available
Digestive
Not Available
Not Available
Psychology
Not Available
Not Available
Healing
Not Available
Not Available
Qualities Associated
Not Available
Not Available