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GIA Now Provides Country Of Origin Certification For Coloured Diamonds

The Gemological Institute of America (GIA) has added natural coloured diamonds to the GIA Diamond Origin Report Service, which until now matched only faceted D-to-Z 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 program 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, the GIA compares the data from the polished stone with that on file from the rough. A match will result in the GIA confirming the country of origin for that particular stone.

“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.”

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