Analysis & Grading

Colored Diamond Reports & Services Details

Colored Diamond Reports

GIA colored diamond reports describe the color origin and color grade for natural colored diamonds. The reports will identify shape and cutting style, carat weight, measurements of the diamond and also if any color or clarity treatments are present. Multiple security features on GIA colored diamond reports ensure their authenticity. Reports can include a digital photograph of the diamond upon request.
 

Colored Diamond Grading Report

The GIA Colored Diamond Grading Report provides a full quality assessment of a natural colored diamond including the color grade and color origin (natural vs. treated color), carat weight, and clarity along with a plotted diagram of its clarity characteristics.

Submission Criteria

  • 0.15 carat and up

  • Loose

  • Colored diamonds

Colored Diamond Identification And Origin Report

The GIA Colored Diamond Identification and Origin Report provides a quality assessment of a natural colored diamond including the color grade and color origin (natural vs treated color).

Submission Criteria

  • Any carat size

  • Loose or mounted

  • Colored diamonds

Add-On Services

GIA Add-On Services give you further information or security for your colored diamond. Must accompany a Report Service or Follow-Up service. Certain services can be expedited for an additional fee; exceptions will apply.
 

Same Day Service

Some services may be completed by 4:00 p.m. on the same day the diamond is received, provided the diamond is received by 10:00 a.m.

Service Restrictions
Same day services will vary by intake location, so please check availability with your local Client Services Representative.

GIA does not offer the same day service on colored diamonds that may be considered green, pink or blue in color. The testing needed to determine the origin of these types of diamonds often takes more time than a same day service time frame allows.

Laser Inscription

Personalize, brand or easily identify your diamond. Microscopically inscribe a personal message, symbol, logo, or your diamond’s unique GIA report number on its girdle.


Submission Criteria
  • Loose

  • Colored

  • D-to-Z diamonds

Service Restrictions
Not available with Report Verification services.

Sealing

Seal your diamond and its key grading details in a secure, tamper-resistant package at the completion of the grading process.

Submission Criteria

  • Loose

  • Colored or D-to-Z diamonds

Service Restrictions
Depending on the dimensions of the diamond, it may not be possible to seal items over 8.00 carats.

Digital Photograph

A digital photograph of your colored diamond can be included on your GIA Colored Diamond Grading Report or Colored Diamond Identification & Origin Report.

Submission Criteria

  • Loose

  • Colored diamonds

Diamond Color Treatment Letter

If the Color Origin stated on your GIA report is "Treated Color", a Diamond Color Treatment letter can be requested to provide the specific color treatment method.

Submission Criteria
Letter can be requested without resubmitting the diamond.

Damage Assessment

The Damage Assessment service is offered as a supplement to GIA diamond reports to determine if a diamond has been damaged since its last polishing. Results of the damage assessment are delivered in letter format.

Submission Criteria

  • Loose or mounted

  • Colored or D-to-Z diamonds

Diamond Type Analysis

GIA will determine your diamond’s type (Ia, Ib, IIa, or IIb) and contact you with the results. You may also request a letter and photograph of the diamond with your analysis for an additional charge.

Submission Criteria

  • Loose

  • Colored or D-to-Z diamonds

Follow-Up Services

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

Recheck And Final Observation

Request a re-assessment of your diamond’s color, cut, clarity, color origin, polish, symmetry, measurements or fluorescence results and a new report will be issued.

Submission Criteria

  • Loose

  • Colored or D-to-Z diamonds


Service Restrictions
Must be requested during the time of service before the item is returned. If requested within sixty days after the item is returned, the original report must be submitted and an Update service must be performed prior to the Recheck or Final Observation.

Update

Submit your diamond to be re-graded based on its current condition. Update service can accompany Add-On services such as Sealing or Inscription where a re-evaluation of the diamond is required prior to performing the Add-On service.

Submission Criteria

  • Loose

  • Colored or D-to-Z diamonds

  • Diamond must be submitted along with its original GIA report, if available

Re-Examination

If your GIA-graded diamond has been re-cut, submit your diamond for a Re-Examination. The diamond will go through the grading process and a new report will be issued. The old report will not be returned. 

Submission Criteria

  • Loose

  • Colored or D-to-Z diamonds

Report Verification

Confirm that your GIA report matches your diamond. Verification results will be returned in letter format attached to your original report.

Submission Criteria

  • Loose or mounted

  • Colored or D-to-Z diamonds

  • Diamond must be submitted along with its original GIA report

Service Restrictions
Laser Inscription service not available with Report Verification.

Specialty Services

GIA Specialty Services offer further analysis and information on your noteworthy colored diamonds. Services are customized with in-depth information specific to your colored diamond. Various levels of service are available depending on your needs. 
 

Monograph

The GIA Monograph is a customized gemological report designed to showcase and celebrate exceptional diamonds. Each monograph comes complete with photographs, detailed grading and identification information, spectroscopic analysis, historical background and other supporting content. The monograph tells the complete story of the diamond and is presented within a handmade box inscribed with the diamond’s name. Included is a USB drive with the digital copy of the diamond’s story.


Submission Criteria

  • Only available for qualifying diamonds

  • Must accompany a Report Service

Please call your Client Services Representative for details or contact us.


Portrait Report

Packaged in a hard-bound portfolio, the GIA Portrait Report includes a high-resolution photograph of the colored diamond, detailed background information unique to the diamond class, and a detailed description of grading and test results. 
 

Submission Criteria

  • Must accompany a Report Service

Please call your Client Services Representative for details or contact us.

 



Notable Letter

The Notable Letter accompanies a GIA report and details the attributes of especially noteworthy or unique colored diamonds. The letter includes a face-up photo, a micro photo, and comments on the gemological properties such as color, size, and clarity that make the diamond unique. 
 

Submission Criteria

  • Only available for qualifying diamonds

  • Must accompany a Report Service

Please call your Client Services Representative for details or contact us.

 



Batch Services

GIA Batch Services utilize GIA-developed technology to analyze and sort colored diamonds based on varying test types.  Minimum submission quantities vary by service. 
 

Quality Assurance

Identifies and provides results based on specified test criteria for smaller diamonds. Results are presented in a table format. Grading is not included.


Available Tests

  • Clarity Treatment

  • Diamond Type

  • Gem Material

  • Natural vs. Synthetic and Color Treatment

  • Surface Treatment


Submission Criteria

  • Diamonds 0.20 carats or less

  • Black diamonds 5.00 carats or less

  • Loose or mounted

  • Up to two test categories per submission

 


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