As an individual non-profit and independent organisation, it is a global authority conducting diamond grading and gem identification. GIA does not source or sell diamonds, it is a renowned and well respected grading laboratory. For our customers to truly decipher a value of a diamond, GIA uses its colour, clarity, cut and carat weight to grade the stone, allowing consumers to compare prices and quality. 

Why GIA Diamonds?

GIA was established in 1931, revolutionising in its approach to grading, analysis and development of diamonds. GIA has robust procedures in place to ensure a diamond’s anonymity and the objectivity of the grading process. The GIA has educational campuses globally, first-class laboratories and unrivalled research facilities, which it has dedicated to gemmology and to ensure public trust in gems and jewellery is maintained.

GIA Grading Reports

For more than 50 years, fine jewellers everywhere have considered the GIA Diamond Grading Report the premier credential of a diamond’s authenticity and quality. A GIA Diamond Grading Report is a customer’s assurance that your diamond is a natural diamond, with disclosure of any treatment to enhance colour or clarity. The report provides clear evidence that is vital to a confident purchase.

GIA certificates are a report card which details the analysis carried out on any shape of diamonds above the weight of 0.18ct. Diamonds are graded before they are set into any piece of jewellery.  In addition to a full assessment of the diamond's 4Cs, the GIA report contains a unique number, which is also sometimes inscribed on the diamond’s girdle. You can use the report number to access GIA’s online global report database, GIA Report Check, to verify that the diamond is GIA graded and view all its grading details.