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September 22, 2022

From the Lab: Diamond Finish – Polish and Symmetry

By Wade Abel, CG, Director of Gemological Services, AGS Laboratories Diamond cut is a direct reflection of the craftsmanship of the artisan who put the diamond on the wheel. The design of the cut, the execution of that design by the cutter, and the high polish possible with a diamond are all factors that contribute to the finish of the diamond. When diamond graders assess diamonds for polish and symmetry, the visibility, as well as the number of faults, are taken into consideration. As with diamond clarity, polish and symmetry are assessed and assigned grades at 10x magnification under a

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