Origin
Southern and central Africa
Brazil, Madagascar, Zimbabwe, Russia, Sri Lanka, India, Burma, Origins: Brazil
Color
White, Colorless, Blue, Red, Green, Yellow, Violet, Black
Greenish, Green, Brownish, Red, Blue, Brown, gray
Element of Planets
-
Earth, Water
Specific Gravity
3.03-3.18
3.69-3.81
Fracture
Uneven, Irregular, Conchoidal
Uneven, Conchoidal to uneven, ConchoidalWalter Schumann
Cleavage
{???} Indistinct
Distinct on {110}, imperfect on {010}, poor on {001}
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
BeAl 2 O 4
Pleochroism
Very strong: pale yellow colorless
X = red; Y = yellow-orange; Z = emerald-green
Transparency
Transparent
Transparent, Translucent, Transparent to translucent
Refractive Index
1.614-1.666
1.746-1.763
Optic Character
-
Biaxial/+
Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Orthorhombic
Birefringence
0.014-0.032
0.007-0.013
Clarity
Transparent
Transparent
Cardiovascular
-
Supports heart health
Psychology
Self-acceptance
Transformation
Healing
Emotional healing
Physical healing
Qualities Associated
Self-Exploration
Transformation