The 4 C’s of diamond grading

The 4 C’s of diamond grading

It’s an alphabet that transcends language barriers. Recognized worldwide, the GIA (Gemological Institute of America), created a universal grading system as an unbiased assessment of a diamond’s qualities to establish its value. Those 4 C’s are Color, Clarity, Cut, and Carat. Each “C” is evaluated on its own scale and results can be provided in a report to accompany a diamond for insurance or sale purposes. While this grading system primarily addresses the white diamonds that are more abundant in the market, salt and pepper and grey diamonds are often left out of this standard evaluation. While their Carat and Cut can be assessed, their Color and Clarity ranges go beyond the scale and therefore many of these unique diamonds are not graded according to the standard 4 C’s. ATTIC’s one of a kind engagement rings using salt and pepper or grey diamonds, however, can be appraised and each unique diamond assessed upon request.


GIA report 


The GIA is an internationally-recognized non-profit institute dedicated to research and education in the field of gemmology - the study of gemstones. They developed the 4C’s grading system, as well as provide evaluation reports for diamonds, which come with GIA certification that it has passed through their grading process. Most of ATTIC’s white diamonds over 0.50ct come with a GIA certificate. For diamonds that do not, we are able to provide a third-party appraisal upon request. 


To learn more about the 4cs head to the GIA or download the GIA 4c’s app