Lab Class

Colored Stone Grading Lab Class

Lab class description

Through extensive hands-on practice using gemstones, you will explore grading the colour, clarity and cut quality of a wide range of coloured stones. Coursework includes the study of the GIA Coloured Stone Grading System; how to describe colour by hue, tone and saturation; and how to judge gem quality factors. Topics also include the relationship between light and colour and developing colour memory. Study of this content can improve the consistency and accuracy of coloured stone grading skills. Students must pass a two-stone practical exam to complete the class successfully. Once you have completed the class, you will keep a lab manual, a gem cloth, a pinpoint incandescent light source and a colour grading card.

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What you earn

  • Letter of Completion