About GIA Worldwide

Established in 1931, GIA is considered the world’s foremost authority in gemmology. Present in 13 countries, with 10 campuses, 4 research centres, and 9 grading laboratories grading the world’s most important gemstones.

  • GIA is a nonprofit institution dedicated to continuous education and research in the field of gems and jewellery.
  • GIA’s mission is to ensure public trust in gem and jewellery by upholding the highest standards of integrity, academics, science, and professionalism.
  • GIA created global standards to accurately determine the quality of diamonds (4Cs – Colour, Clarity, Cut, and Carat Weight), coloured stones and pearls (7 Pearl Value Factors™ - Size, Shape, Colour, Nacre, Lustre, Surface, and Matching).
  • GIA has supported the journey of the global gems and jewellery industry through breakthrough gemmological research, unbiased analysis of gemstone quality, and by providing the most respected professional credentials.