Analysis & grading

SAMPLE COLOURED DIAMOND REPORTS

GIA Coloured Diamond Reports offer thorough, unbiased analyses in an easy-to-understand format. 

The GIA Colored Diamond Grading Report provides a full quality assessment of a coloured diamond including the colour grade and colour origin (natural or treated), carat weight and clarity, along with a plotted diagram of its clarity characteristics. As an optional service, a full-colour image of the diamond may also be included. For any loose coloured diamond.
 

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Coloured Diamond Grading Report

The Colored Diamond Origin Report includes a full assessment of the 4Cs - Colour, Clarity, Cut and Carat Weight - along with a plotted diagram of its clarity characteristics, a confirmation of geographical origin and laser inscription of the GIA report number for easy identification. This service is only available for eligible diamonds, weighing 0.15 carats or more, that have gone through rough analysis with GIA before polishing.

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Sample Coloured Diamond Origin Report

The GIA Colored Diamond Identification and Origin Report describes the colour origin as natural or treated (such as HPHT processed or artificially irradiated). For loose coloured diamonds, the report will also include the diamond’s colour grade. As an optional service, a full colour image of the diamond may also be included. For any coloured diamond, loose or mounted.
 

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Coloured Diamond Identification and Origin Report

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