Cut Grading Diamond

Put simply cut is responsible for the quality and degree of a diamond s sparkle.

Cut grading diamond.

There are three factors that determine a diamond s cut. This cut represents roughly the top 15 of diamond cut quality it reflects nearly as much light as the ideal cut but for a lower price. And a simplified proportion. And of all the diamond 4cs it is the most complex and technically difficult to analyze.

The gia diamond cut grading system most of the diamonds industry follows a cut scaling system that was created by the gia gemological institute of america a non profit organization which rates the diamond s cut with the following grades from best to worst. Non standard round brilliant cut diamonds. By choosing a radiant cut over a round. In fact the radiant cut diamond is one of the most affordable diamond shapes.

This rare cut represents roughly the top 3 of diamond cut quality it reflects most of the light that enters the diamond. As a diamond deviates further from having ideal light performance so does the numerical grading value as it starts increasing from 1 excellent 2 very good. A description of its shape and cutting style. But reports do contain an assessment of the diamond s polish and symmetry.

Every diamond certified by the gia undergoes a thorough independent evaluation. Here you will learn how gia diamond grades are established and how those grades affect the diamond s price. Blue nile offers four different cut grades ideal. For example this 1 01 carat vs1 clarity h color radiant cut diamond from james allen costs 3 300.

Meanwhile this round brilliant cut diamond of the same clarity color and carat weight costs 5 240 almost 40 more. Each of the four c s carat weight cut color clarity is accompanied by a diamond chart illustrating the differences between grades. Fortunately all of these factors have already been taken into consideration. At this time an overall cut grade for non standard round brilliant diamonds or fancy shaped diamonds such as rectangular oval or square is not available on gia grading reports.

The best cut diamonds will sit in the intersection between gia excellent and ags ideal. American gem society taking cut grading to a higher level. Cut estimator enter a round diamond s table crown angle and pavilion angle to see how it would be scored based on the gia and ags proportion based cut grading systems. Cut is the only one of the 4cs that is affected by human hands.

Two diamonds may have the same clarity color and carat weight but cut is what determines whether or not one is superior to the other.