These reports indicate the 4 C (cut, clarity, color and carat weight) quality grades of diamonds on the color scale D-Z and sizes from 0.10 – 2.00 carats as per well-established international criteria. Before grading for quality, each diamond is first determined whether it is natural or synthetic or treated by any means.
Grading report is issued for both – natural and synthetic diamond, with clear mention of its nature on the grading report. AIGS Laboratories India does not issue grading reports for filled diamonds, while other treatments are mentioned on the reports. A set criterion is strictly followed in accordance with international criteria and a master color comparison set.
These reports mainly contain information on:
- shape and style of cut
- dimensions (maximum – minimum diameter x height) in mm
- weight (in carats, up to two decimal points)
- color grade (in the range D-Z)
- fluorescence
- clarity grade
- cut grade including polish and symmetry
- comments: include any additional information on presence or absence of treatments, damages, any information which may help to Interpret the results on the report.
For security, every report is carries a color photograph of the specimen/s being tested, a unique QR-code for report verification and a AIGS Laboratories India stamp and other hidden features
