Origin
Southern and central Africa
Southern and central Africa
Color
White, Colorless, Blue, Red, Green, Yellow, Violet
Colorless, Green, gray, pink, Yellow
Specific Gravity
1.98-2.50
2.56-2.62
Fracture
Conchoidal
Uneven
Cleavage
None
From the Greek for oblique and fracture, descriptive of the cleavage
Mohs Hardness
5.5-6.5
6-6.5
Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
(Na,K)AlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
-
Vitreous, Pearly
Transparency
Translucent
Translucent
Refractive Index
1.37-1.52
1.518-1.534
Crystal System
-
Triclinic Pinacoidal H-M Symbol (1) Space Group: P1
Birefringence
-9999
0.006-0.008
Clarity
Translucent
Translucent
Neurological
-
Aids in mental clarity and focus
Cardiovascular
-
Supports heart health
Psychology
Creativity
Harmony
Healing
Emotional healing
Emotional healing
Qualities Associated
Creativity
Harmony