Reports issued for diamonds by the GIA are renowned for their promise of integrity and authenticity and are respected highly across the world. This laboratory issues a wide range of reports in different report formats for diamonds. While all reports provide detailed information on the vital 4Cs of each individual diamond, they are issued in different formats depending upon the stone.
Diamond grading report
Gia Grading Report
Diamond grading reports are provided usually for diamonds over one carat and provides important information encompassing diverse aspects of the stone. Besides the GIA grading report, the GIA grading report with cut grade can also be opted for. If the customer opts for additional micro inscription on the diamond, its details are also provided in the comments section of the report.
GIA Grading with Cut Grade
Diamond dossier reports
The GIA diamond dossier is usually issued for diamonds under one carat and it provides information similar to the grading report. Unlike grading report that levies extra for laser inscription registry, the diamond dossier provides it free of charge. Thus details of the GIA report number micro-laser inscribed on the diamond at the buyer's request. Important limitations regarding the report are given at the back. The GIA diamond dossier with cut grade can also be availed of.
Details provided in GIA grading reports
While reports are provided in different formats, depending upon the weight of the stone and its type, the following details are present in each GIA report.
Report number: A unique number assigned to a diamond and registered in GIA's global database.
Shape and cutting style: Details the shape of the diamond and how the various facets are cut.
Measurements: This includes dimensions of the diamond as minimum diameter - maximum diameter x depth (for round diamonds) or length x width x depth (for fancy shapes).
Weight: This is provided in carats
Proportions: Various characteristics of the diamond are underlined here. These include,
Table: Average size of the table facet in relation to the average diameter (for round diamonds). For fancy shapes this is measured as width of the table facet in relation to the width of the diamond.
Depth: For round shapes, this denotes the depth of the diamond with relation to the average diameter. For fancy shapes, this refers to width of diamond.
Girdle: Thickness of the girdle with relation to size or condition (faceted or polished) of the diamond.
Finish: This grades the polish and symmetry of a diamond, size, shape and placement of facets.
Culet: Details the size of the culet relative to size of diamond.
Polish: This provides information on the smoothness of the diamond and its overall condition.
Reference Diagram: This approximates the shape and cutting style of the diamond. It also indicates clarity characteristics in the stone. Key to symbols used on the diagram is also provided.
Proportion diagram: A graphic profile representation of the actual diamond's proportions is provided here.
Grading scales: GIA grading scales on color and clarity are provided. The clarity grade provides grading on a scale which lists from flawless to included. Color grading is provided on a scale from colorless to light yellow, brown or gray. Color grading is achieved by comparing stones to master comparison diamonds.
Security features: To ensure that the certificate is secure and cannot be forged, GIA certificates come with certain security features. These include hologram, watermark, an embossed seal, chemical sensitivity feature, microprint lines and security screen are also provided to ensure that the certificate is original.
Other details: Other details include date of issue, degree of clarity, color, fluorescence and measurements of the diamond.
Other features
The laboratory also issues special reports designed specifically for colored diamonds.
Color Grading Report
GIA also offers the Gem identification report whereby reports are issued on the different gems such as sapphires, rubies, emeralds etc. It also provides services like the Report Check which allows users to easily confirm whether the information on their certificate matches the information archived in the GIA online databases. This service is currently provided for diamond grading reports and dossier reports issued after January 2000.
Limitations
GIA grading report has certain limitations that customers must be aware of. These are,
- The laboratory does not grade mounted diamonds. Only loose diamonds must be sent to GIA for grading.
- The certificate does not provide retail value of the diamond. These details are only provided in diamond appraisals that provide information on all 4Cs while also suggesting an approximate retail value for the stone.
- The report is simply a detail of the diamond characteristics and is not a guarantee on the stone.
You can read more about the GIA diamond lab as well as check out our GIA diamond search results , happy shopping from Gemisimo.com |
