Reports
Diamond Grading Report
The WGI Diamond Grading Report includes a detailed analysis of the diamond's 4Cs: carat weight, colour, clarity and cut, the universally recognised criteria for evaluating a diamond's quality. It also records the diamond's shape, measurements, inclusions, polish and symmetry.
What the service provides
- An independent assessment of the diamond's 4Cs
- An in-depth proportions diagram for a clear understanding of the cut
- A unique online report verification number
The process
- 01The diamond is weighed and measured with calibrated instruments
- 02Colour and clarity are assessed under controlled lighting and magnification
- 03Cut, polish and symmetry are evaluated against proportion analysis
- 04Findings are reviewed and the report is prepared
What a report may contain
- Shape and cutting style
- Measurements
- Carat weight
- Colour grade
- Clarity grade and characteristics
- Cut, polish and symmetry
- Proportions diagram
Who it is for
- Consumers buying or owning a diamond
- Jewellery retailers and manufacturers
- Diamond dealers and wholesalers
Report contents depend on the item submitted. WGI describes the characteristics found; results cannot be guaranteed in advance.
World Gemological Institute
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