Analyses and separates diamonds from simulants, laboratory-grown and potentially HPHT treated natural diamonds.
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GIA established the 4Cs (Cut, Clarity, Color, Carat Weight) - the global standards for evaluating diamond quality.
The GIA Diamond Grading Report includes an assessment of a diamond's 4C's - color, clarity, cut, and carat weight - along with a plotted diagram of its clarity characteristics and a graphic representation of the diamond's proportions. For standard round brilliant cut diamonds falling in the D-to-Z color range, the report also includes a GIA Cut grade.
The GIA laboratory issues diamond grading reports for loose, natural diamonds in the D-to-Z color range that weigh 0.15 carats or more. GIA Diamond Grading Reports are not issued for laboratory-grown, simulants, mounted diamonds or those that have undergone unstable treatments, such as fracture filling or coating. And while reports may be issued for diamonds that have been laser drilled or HPHT processed, these stable treatments are prominently disclosed on the report.
The GIA Diamond Origin Report includes a full assessment of the 4Cs along with a plotted diagram of its clarity characteristics, a confirmation of geographic origin, and laser inscription of GIA report number for easy identification.
The GIA Diamond Dossier offers the same grading information as the GIA Diamond Grading Report but without the plotted diagram. As an added security feature, the Dossier service includes a microscopic laser inscription of the report number on the diamond's girdle.
The GIA laboratory issues the Diamond Dossier for loose, natural diamonds between 0.15 and 1.99 carats, in the D-to-Z color range. The Diamond Dossier is not issued for laboratory-grown, simulants, mounted diamonds, diamonds that have undergone unstable treatments such as fracture filling or coating, or those that have been HPHT processed. Any evidence of other treatment is prominently disclosed in the report.
The GIA Diamond eReport, a digital-only report, provides the same impartial and exacting grading results you'll find on other GIA reports. The report includes a graphic representation of the diamond's proportions, and the added feature of a detailed face up image of the diamond captured during the grading process.
Paperless and therefore environmentally friendly, the GIA Diamond eReport is accessible online via Report Check, GIA's secure web-based report database, making the report always accessible and shareable. This service is available for natural, untreated diamonds in the D-to-Z colour range that weigh from 0.15 to 2.99 carats.
Online report only. The GIA Diamond Focus Report is a cost-effective grading report delivering key grading information in a digital format for select natural D-to-Z diamonds.
The GIA Colored Diamond Grading Report provides a full quality assessment of a coloured diamond including the coloured diamond colour grade, colour origin (natural or treated, such as HPHT processed or artificially irradiated), carat weight, clarity, and a plotted diagram of its clarity characteristics. As an optional service, a full colour image of the diamond may also be included.
Unlike GIA's D-to-Z color grading system, which is based on the relative absence of colour, coloured diamond colour grading is based on the presence of colour. Using a controlled viewing and lighting environment and a comprehensive set of colour comparators, trained graders consistently determine the characteristic colour of a diamond and assign a colour grade ('pink,' for example). The hue chosen is modified by a 'Fancy-grade' term, such as Fancy Light, Fancy, Fancy Intense, Fancy Deep, Fancy Vivid or Fancy Dark, which describes the combined effect of tone and saturation.
The laboratory issues this report on loose, natural coloured diamonds weighing 0.15 carats or more. The GIA Colored Diamond Grading Report is not issued for laboratory-grown, simulants, mounted diamonds or those that have undergone unstable treatments, such as fracture-filling or coating. Any evidence of other treatment is prominently disclosed in the repView a sample ReportFees for Services
The GIA Colored Diamond Identification and Origin Report describe the colour grade of a coloured diamond as well as its origin of colour (natural or treated, such as HPHT processed or artificially irradiated). As an optional service, a full colour image of the diamond may also be included.
Both mounted and loose natural coloured diamonds of any size can be submitted for this report service. The GIA Colored Diamond Identification and Origin Report is not issued for laboratory-grown, simulants, or diamonds that have undergone unstable treatments, such as fracture-filled or coated diamonds. Any evidence of other treatment is prominently disclosed in the report.
Microscopically inscribe a personal message, symbols, logos, or your diamond's unique GIA report number on its girdle. Laser inscription allows you to personalize, brand or easily identify your diamond.
Laser inscription of the GIA report number is included with the Diamond Dossier and all Synthetic Diamond Reports.
Fees for Services
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. Supplemental to a GIA diamond report.
With an increase in treated and synthetic diamonds in the marketplace, GIA now offers testing for loose and mounted diamonds in the smaller size ranges to help you quickly make determinations about items being offered to you. Available for D-Z and colored diamonds 0.20 carats and less and black diamonds 5.00 carats and less, this service offers tests to determine
Submit diamonds for color analysis and to be assembled into a master diamond set for D-to-Z color grading. Each diamond submitted must meet stringent criteria for shape, weight, proportions, conditions, and more to be included as part of a set. The set is issued a Master Diamond report listing the diamonds in the set and their color grade.
Two sets minimum. Please contact us at 760 603 4500 for important information before submitting your items for this service.
GIA is able to complete some diamond services by 4pm if the diamond is received by 10am on the same day. These services will vary by location, so please check availability with your local customer service representative.
Available for D-to-Z diamonds, and colored diamonds that are not considered green, pink or blue as testing to determine the origin of these types of diamonds often takes more time than same-day service allows.
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.
If it's been a while since your diamond was graded and you'd like to confirm its quality, resubmit the diamond along with its original GIA report. The diamond will go through the grading process and a new report will be issued.
Convert your current GIA report to a different report type. Submit the diamond along with its original GIA report. The diamond will go through the grading process, and a new report will be issued.
Confirm that your GIA report matches your loose or mounted diamond. Submit the diamond along with its GIA report. Verification results will be returned in letter format attached to your original report.
To confirm your diamond's grading conclusion within 60 days of the original analysis, resubmit the diamond with its GIA report. Final Observations are not available for diamonds that were issued Dossiers or eReports.
Offered as a supplement to GIA diamond reports to determine if a diamond has been damaged since its last polishing. Results are delivered as a GIA Identification Report.
Available for loose or mounted, D-to-Z or colored, natural diamonds.