Lab Reports & Services

GIA is the world’s most trusted name in diamond grading and gem identification. With objectivity and expertise as its hallmarks, GIA ensures the integrity and accuracy of every report it issues. GIA tests every material submitted to determine whether it is natural or not, and discloses any treatments discovered during our examination.

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Reports & Services

Diamond - Lab Services

Natural Diamonds

Assessment of authenticity and quality for diamonds in the D-to-Z color range from GIA, creator of the 4Cs. 

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Colored Diamond - Lab Services

Natural Colored Diamonds

Assessment of color origin and quality based on GIA’s color grading system for diamonds outside the D-to-Z range.

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Reports Laboratory-Grown

Laboratory-Grown Diamonds

Identification of laboratory-grown diamonds, ensuring disclosure through laser inscription and distinctive reports.  

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Colored Stones

Confirmation of a gemstone’s identity and characteristics through a full gemological examination.

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GlobalGem GemEncyclo Pearl


Documentation of the specific attributes of pearls and pearl jewelry, including mollusk type and growth environment. 

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A&G Landing Reports Unknown


Let GIA gemologists do the detective work to reveal the identity of your material.

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3 ways to submit a gemstone to gia


Submit your gemstone through your local jeweler. 

Send to GIA

Ship your gemstone directly to one of our laboratories.

Prepare for Submission

Bring your gemstone to either of our two Hong Kong locations.

Contact Us


Please contact GIA directly for instructions.

  • GIA Customer Service: +1 800 421 7250 ext 7590 or +1 760 603 4500 ext 7590

  • Contact us