The diamond is of the highest color grading for a white diamond and clarity ranking.

这颗钻石具有白钻石最高的颜色评级和净度。

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The technology of grading of micro diamond powder and the dispersion of micro powder in water are studied in this paper. At the same time a system of shooting flow grader is designed.

本文研究了超细金刚石微粉的流体分级技术，设计了一套射流分级器，并对金刚石微粉在水中的分散性进行了初步研究。

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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.

FORBES: 110-Carat Yellow Diamond Sells for a Record $12.3 Million