Diamonds & Diamond Grading

GEM 230

Course Description

GIA will be closed December 23, 2019 through December 27, 2019. All support staff will be out of the office and unavailable to assist with the registration process during this time. Any PDF applications must be received by Admissions by Wendesday, December 18, 2019 at 12:00pm PST. There will be no new eLearning courses starting the week of December 23 - 27. Regular business hours will resume on January 2, 2020.

This course covers the skills needed to grade the color, clarity and cut of diamonds. Subjects explored include determining proportions and estimate weight; the fundamentals of diamond treatments, simulants, and laboratory-grown diamonds; and the effect of fluorescence on diamond body color. Other topics discussed include the role cut plays in the marketplace; the technical knowledge needed to make effective buying and selling decisions; and other segments of the diamond industry – dealing, cutting, manufacturing. The final exam is online, closed book and proctored; see the Education Catalog for details.


  • Diamonds & Diamond Grading Certificate