Origin
Southern and central Africa
Madagascar
Color
Blue, Grey
Brownish, Black, Reddish, Brown, Blue
Specific Gravity
2.58-2.64
3.84
Fracture
-
Subconchoidal, Conchoidal
Cleavage
-
{0001} good, {10 1 0} parting
Chemical Composition
SiO 2Walter Schumann , Gemstones of the world (2001)
(Ca,Ce)(Al,Ti,Mg)12O19
Pleochroism
-
O = brownish gray; E = gray
Refractive Index
1.534-1.540
1.79-1.807
Crystal System
-
Hexagonal
Birefringence
-9999
-9999
Cardiovascular
Aids in digestion and soothes the stomach
-
Psychology
Protection
Empowerment
Healing
Emotional healing
Emotional healing
Qualities Associated
Protection
Balance