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GRADUATE COLORED STONES

From Sri Lanka to Africa, from Vietnam to Australia and Brazil, GIA’s Graduate Colored Stones Diploma Programme will take you on an alluring journey through the world of these exotic gemstones.

Course Highlights


  • Identify 60 species of common and unusual gemstones including ruby, sapphire, emerald, demantoid garnet, and benitoite, and how illumination techniques can facilitate the identification process
  • Detect latest treatments such as opal doublets, opal triplets, heat treated rubies, beryllium diffused sapphires and rubies, lattice diffused sapphires and many other treatments
  • Detect synthetics, rubies, sapphires, emeralds and many other gemstones by identification of inclusions and use of common gemmological instruments
  • Gain experience on working of common gemmological instruments such as microscope, 10x loupe, polariscope, refractometer, spectroscope (hand-held and tabletop), dichroscope, Chelsea filter and ultraviolet lamp (long wave & short wave)
  • Gain additional knowledge of high-tech equipment used in renowned gem testing laboratories such as FTIR, Raman Spectroscopy, and others

Ideally Suited For


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

UPCOMING COURSES