GIA (Gemological Institute of America)

GIA (Gemological Institute of America)

  • i101

Established in 1931, GIA (Gemological Institute of America) is the world’s foremost authority on diamonds, coloured stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewellery.

Please wait loading...


  • Contact Information

    GIA (Gemological Institute of America)

    104 Great Russell Street London WC1B 3LA United Kingdom
       +44 2078134321
    Fax:  +44 2078134331

We use cookies to operate this website and to improve its usability. Full details of what cookies are, why we use them and how you can manage them can be found by reading our Privacy & Cookies page. Please note that by using this site you are consenting to the use of cookies.