Caribbean Gem Academy
Coloured Gemstone Grading #2
WGF Colour Grading Systems

This online course consists of a comprehensive overview of the GemeWizard Colour Grading System including colour theory (hue, tone and saturation), how they impact on the value of gemstones, practical exercises that are completed online, and a six month subscription to the Gemewizard program.

Cost: $ 1150 USD