Analysis & grading

Natural Coloured Diamond Reports & Services

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Available reports

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

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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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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Frequently asked questions

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Resources

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    Report check plus

    Easily download grading results and PDFs of multiple reports at once.

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    Facetware cut estimator

    Use GIA’s free online tool to estimate a cut grade.

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    Questions? Call +1 800 421 7250 ext 7590 or
    +1 760 603 4500 ext 7590

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