Origin
Brazil, Southern and central Africa, Sri Lanka
Russia
Color
Red, gray
Pale pink, Red, White, pink, Blue, Green
Solubility
Insoluble in acids
-
Specific Gravity
4.20-4.30
2.30-2.60
Fracture
Uneven, Conchoidal
Uneven, Conchoidal
Cleavage
{110} good, 100 moderate, parting on {092} and {011}
{111} Imperfect
Mohs Hardness
6-6.5
5.5-6
Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Na 4AlBeSi 4O 12ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pleochroism
Weak to distinct brownish red-green-yellow
ModerateArthur Thomas
Transparency
Transparent, Translucent
OpaqueHerve Nicolas Lazzarelli
Refractive Index
2.609-2.903
1.494-1.504
Crystal System
tetragonal
tetragonal
Birefringence
0.296
0.008
Clarity
Transparent
OpaqueHerve Nicolas Lazzarelli
Healing
Physical healing
Emotional healing
Qualities Associated
Awareness
Emotional Healing