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GRADUATE GEMOLOGIST

Earn the most prestigious credential in the industry. GIA’s Graduate Gemologist Diploma Programme gives you comprehensive knowledge of diamonds and coloured stones you need to succeed in the global gem and jewellery business. You will gain both technical expertise and practical skills to evaluate diamonds by the GIA 4Cs (Colour, Clarity, Cut, and Carat Weight) and the GIA International Diamond Grading System™, and to identify and evaluate common and unusual gemstones.

The programme consists of two diploma programmes (Graduate Diamonds and Graduate Colored Stones).

Course Highlights


  • Develop in-depth, hands-on experience with the GIA International Diamond Grading System™ and the 4Cs (colour, clarity, cut, and carat weight), and learning how they affect diamond value
  • Grade diamonds in the D-to-Z colour range consistently and accurately
  • Learn diamond identification and grading skills used by GIA
  • Distinguish natural, treated, and synthetic gemstones using the GIA Colored Stone Grading System to determine gemstone quality
  • 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

Ideally Suited For


  • Diamond Manufacturers
  • Jewellery Manufacturers
  • Loose Diamond / Coloured Stone Buyers and Sellers
  • Jewellery Retailers and Wholesalers
  • Lab and Research Professionals
  • Any individual aspiring for a career in gems and jewellery industry

GIA : MUMBAI CAMPUS

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Alumni Speak

Tanay Khandelwal
Tanay Khandelwal
Graduate Gemologist Diploma Programme, Jaipur

Earning my professional credentials at GIA has helped me understand my business and customers better. It has given me the confidence to handle customer queries and make more informed buying and selling decisions. I also know that the trust and satisfaction my customer's have in me and my business has increased.

UPCOMING COURSES