The only other fancy colored diamond grading guide in existence is from the Gemological Institute of America.

FORBES: A Guide for Fancy Colored Diamonds

It provides interactive 4Cs education that retailers can show consumers, guidance on using GIA grading scales, information on diamond treatments and access to GIA grading reports.

FORBES: New Jewelry Apps For Consumers and Jewelers

The Sun-Drop is graded fancy vivid yellow, the highest color grading for a yellow diamond, and has a purity of VVS1.

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