The peachy hue also marks the program’s 25th anniversary.
IGI Education - Are Lab Grown Diamond Color Treatments Permanent?
As lab grown diamonds continue to gain popularity, jewelers want to know if modern processes that alter the diamond’s color are permanent.
Brought To You By IGI
Efforts to improve color in natural diamonds began centuries ago with oils, dyes and bright foils applied to the pavilions of diamonds in closed-back mountings. In modern times more sophisticated chemical coatings may be used to lighten the apparent color of diamonds in the D-Z range. These treatments can be scratched, worn off or changed with heat or chemical exposure, so they are not considered permanent. As such, IGI will not issue a grading report for such diamonds.
What About Lab Grown Diamonds?
What Causes Brown Color?
IGI Color Notations Outside the Colorless Range.
- Blue, pink or green at saturations over J are considered Fancy Light
- Blue, pink or green at saturations N-Z are considered Fancy
When present in the NOPQR range: IGI comments include Very Light Brown or Very Light Gray
- When present in the S-Z range: IGI comments include Light Brown or Light Gray
- Note that color grades under N are reported as a two-letter range (N-O, O-P, etc.)
- For yellow diamonds in the N-R range, IGI can include the comment Very Light Yellow
- For yellow diamonds in the S-Z range, IGI can include the comment Light Yellow
Please contact IGI with any questions at www.igi.org.
Without the ability to instill confidence within the industry and directly to the consumer, a diamond holds very little value.
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