Template:Ametrine

From The Gemology Project
Jump to: navigation, search
Ametrine
Chemical composition Silicon dioxide SiO2
Crystal system Trigonal
Habit Prismatic
Cleavage Poor
Fracture Conchoidal
Hardness 7
Optic nature Uniaxial +
Refractive index 1.544 - 1.553
Birefringence 0.009
Dispersion 0.013
Specific gravity 2.63 - 2.65
Lustre Vitreous