Origin
Brazil
Southern and central Africa
Color
Blue, Greenish
Green
Specific Gravity
3.31
2.60-3.02
Cleavage
{110} Good
Perfect
Mohs Hardness
5.5-6
-9999
Chemical Composition
(Fe2+ ,Mg)Al 2(PO 4) 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe2+ ) 5Al(Si 3Al)O 10(OH) 8Anthony et al , Handbook of mineralogy (2001)
Pleochroism
Colorless blueAnthony et al
-
Transparency
-
Transparent
Refractive Index
1.639-1.680
1.571-1.597
Optic Character
-
Biaxial/+
Birefringence
0.041
-9999
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent
Neurological
-
Enhances mental clarity and focus
Psychology
Communication
Spiritual Enlightenment
Healing
Emotional healing
Emotional healing
Qualities Associated
Intuition & Communication
Spiritual Enlightenment