Gia Diamond Cut Ratings

Each of the four c s carat weight cut color clarity is accompanied by a diamond chart illustrating the differences between grades.

Gia diamond cut ratings.

Diamond professionals use the grading system developed by gia in the 1950s which established the use of four important factors to describe and classify diamonds. For standard round brilliant cut diamonds falling in the d to z color range the report also includes a. For diamonds without a gia cut grade because the diamond was certified before gia began assigning cut grades in 2005 or is a shape that gia does not currently assign cut grades to lumera will apply its own cut grade according to a proprietary formula. In this post you can learn about and download the official gia color scale work with an interactive diamond color chart to see the relationship between grades and colors and watch a useful gia diamond color grading video to see how gia evaluates diamond color.

And there would be no way to evaluate and discuss the qualities of an individual diamond. Available only for round diamonds our cut score takes diamond cut grades to the next level. But reports do contain an assessment of the diamond s polish and symmetry. Every diamond certified by the gia undergoes a thorough independent evaluation.

The gia diamond grading report includes an assessment of a diamond s 4cs color clarity cut and carat weight along with a plotted diagram of its clarity characteristics and a graphic representation of the diamond s proportions. Here you will learn how gia diamond grades are established and how those grades affect the diamond s price. A description of its shape and cutting style. Stonealgo indexes over 400 000 diamond prices daily to ensure these deal ratings are fair and accurate.

Those four factors color clarity cut and carat weight are the basis of the international diamond grading system that gia created in the early 1950s as the universal standard of diamonds. Official gia color scale. Many inclusions and blemishes are too tiny to be seen by anyone other than a trained diamond grader. The gia cut grading system introduced in 2005 and validated by thousands of observations by retailers manufacturers and the public who looked at.

And a simplified proportion. At lumera the gia cut grade is always shown. Non standard round brilliant cut diamonds. Clarity color cut and carat weight.

And of all the diamond 4cs it is the most complex and technically difficult to analyze. To determine the cut grade of the standard round brilliant diamond the shape that dominates the majority of diamond jewelry gia calculates the proportions of those facets that influence the diamond s face up appearance. 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.