TABLE IV

Colour-Dispersion of Gem-Stones[9]

Moonstone·012
Quartz·013
Beryl·014
Topaz·014
Chrysoberyl·015
Tourmaline·017
Spodumene·017
Corundum·018
Peridot·020
Spinel·020
Garnet (Almandine)·024
Garnet (Pyrope)·027
Garnet (Hessonite)·028
Zircon·038
Diamond·044
Sphene·051
Garnet (Demantoid)·057