What Will You Learn
- Develop in-depth, hands-on experience with the GIA's International Diamond Grading System and the 4Cs (color, clarity, cut, and carat weight), and learning how they affect diamond value
- Grade diamonds in the D-to-Z color range consistently and accurately
- Learn diamond identification and grading skills
- Distinguish natural, treated, and laboratory-grown gemstones using the GIA Colored Stone Grading System
- Learn the characteristics of coloured stones, with a focus on ruby, sapphire, and emerald
- Identify characteristics, simulants, and treatments, and when advanced testing is required
- Study 60 species of gemstones use gemmological equipment (including a 10x loupe, microscope, polariscope, dichroscope, spectroscope) and procedures to grade and identify hundreds of gemstones
- Translate technical knowledge into valuable information
for effective sales and excellent service
Possible Career Paths
Loose Diamond / Coloured Stone Buyer and Seller
Lab and Research Professional
Aspiring for a career in the gem and jewellery industry
Frequently Asked Question
Diamonds & Diamond GradingJudge and grade diamonds by the 4Cs and color.
Colored Stones & Colored Stone GradingLearn the characteristics of colored stones, with a focus on ruby, sapphire, and emerald.
Gem IdentificationIdentify more than 60 species of gemstones, distinguish naturally from laboratory-grown gems, and detect gem treatments.
Equipment & InstrumentationLearn diamond identification and grading skills GIA graders use.
Treatments, Laboratory-Grown & ImitationsIdentify gemstones that have been laboratory-grown, treated or are imitations.
Markets & Supply ChainsUnderstand how market factors and the supply chain affect value.
Established in 1931, GIA protects the public through gemmological research, education, impartial gem identification and grading services, and instrument development. The world’s foremost authority in gemmology and creator of the 4Cs, GIA sets the standard for determining the quality of diamonds and performs research-based identification of coloured gems and pearls. All of GIA's activities are governed by its mission to serve the public. Learn More