Through extensive hands-on practice using gemstones, you will explore grading the color, clarity and cut quality of a wide range of colored stones. Coursework includes the study of the GIA Colored Stone Grading System; how to describe color by hue, tone and saturation; and how to judge gem quality factors. Topics also include the relationship between light and color and developing color memory. Study of this content can improve the consistency and accuracy of colored 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 class manual, a gem cloth, pinpoint incandescent light source and a color grading card.

Discover how the world’s foremost experts determine the quality of akoya, freshwater, South Sea, and Tahitian pearls. Explore GIA’s 7 Pearl Value Factors^™. Key topics include how to evaluate cultured pearls in order to promote the relationship between beauty, value, and quality in merchandise.