Frenger Lapidaire - gemstone cutting, custom cut gemstones, topaz

Characteristics

-Crystal system : Orthorhombique

-Chemical Composition : Al2(SiO4)(OH,F)2

-Colors : Yellow, yellow orange, pink orange, light blue, blue.

-Hardness : 8

-Refractive index : 1,61 - 1,64

-Dispersion : 0,014

Imperial topaz
Locality : Brazil
Dimensions : 7,2mm x 7,7mm
Color : Orange gold clear
Clarty : SI
Brightness : Excellent
Weight : 1,67 carats
Price : 167 € (100€/ct)