Press Release

GIA Adds Country of Origin Reports for Coloured Diamonds

Strong demand for unique new service; Institute adding global capacity

CARLSBAD, Calif. – 30 May 2019 – GIA added natural coloured diamonds to the GIA Diamond Origin Report Service on 24 May. The innovative service, announced on 28 March, scientifically matches faceted D-to-Z and now natural coloured diamonds to their original rough to confirm the gem’s country of origin.
“Reaction to the GIA Diamond Origin Report is very positive,” said Tom Moses, GIA executive vice president and chief laboratory and research officer. “There is strong interest in this programme from miners, manufacturers and retailers. We are adding capacity for evaluating rough diamonds to meet the strong demand.”
The GIA scientific matching process starts with the collection of physical measurements and other scientific data from natural rough diamonds. GIA then assigns a unique identification number to each rough stone. When polished diamonds with a rough identification number are submitted for grading services, GIA laboratory staff collect the same data. If the data from the polished gems matches the data from the rough, GIA will confirm the country of origin provided by the mining company and include that information on the Diamond Origin Report.
“There is recognition across the diamond value chain of the potential for building consumer trust with scientifically confirmed diamond origin,” said Anna Martin, GIA senior vice president for global business development and beneficiation. “Consumers clearly want to know more about their gems – where they come from, how they are produced, and how their purchases contribute to the well-being and sustainability of gem producing communities.”
The Diamond Origin Report includes the country of origin, a full 4Cs quality analysis of each diamond and a report number inscription. Information about the country of origin and diamond formation is available for each Diamond Origin Report in GIA’s online Report Check service, accessible at, through the QR code printed on each report and in the GIA Origin app, available for Apple and Android phones.
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About GIA

An independent non-profit organisation, GIA (Gemological Institute of America), established in 1931, is recognised as the world’s foremost authority in gemmology. GIA invented the famous 4Cs of Colour, Clarity, Cut and Carat Weight and, in 1953, created the International Diamond Grading System™ which is recognised around the world as the standard for diamond quality.
Through research, education, gemmological laboratory services and instrument development, the Institute is dedicated to ensuring the public trust in gems and jewellery by upholding the highest standards of integrity, academics, science and professionalism.