Coloured Diamond - Lab Services Analysis & grading

Natural Coloured Diamond Reports & Services

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Available reports

Coloured Diamond Grading Report

Colored Diamond Grading Report

Full quality assessment, colour grade and clarity plot. Identifies natural vs. treated colour. For loose, natural, coloured diamonds 0.15 carats or more.

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Coloured Diamond Origin Report

Coloured Diamond Origin Report

Full 4Cs assessment with a plotted clarity diagram, geographical origin and GIA report number laser inscription. For loose, natural, coloured diamonds only, weighing 0.15 carats or more that were submitted for rough analysis.

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Coloured Diamond Identification and Origin Report

Colored Diamond Identification and Origin Report

Describes the colour origin (natural vs. treated) for loose or mounted, natural, coloured diamonds of any size. Colour grade included for loose coloured diamonds.

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Natural Coloured Diamond Services

Add-On Services

GIA Add-On Services give you further information or security for your natural coloured diamond.

Follow-Up Services

GIA Follow-Up Services verify, re-evaluate or update results from your original GIA Report.

Specialist Services

GIA Specialist Services offer further analysis and information on your noteworthy natural coloured diamonds.

Batch Services

GIA Batch Services utilise GIA-developed technology to analyse and sort natural coloured diamonds based on varying test types.


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