Diamond Ring Rating Scale

Many inclusions and blemishes are too tiny to be seen by anyone other than a trained diamond grader.

Diamond ring rating scale. Each of the four c s carat weight cut color clarity is accompanied by a diamond chart illustrating the differences between grades. Many people ask why the gia diamond grading scale starts at d. If a diamond possessing the finest diamond cut grade is also colorless free of inclusions and blemishes and weighs one carat it would be written as. For people who are in a time crunch here s a summary of the diamond rating scales and charts for your convenience.

Classification of diamond color on a d colorless z tinted scale. The gia diamond color grades range from d colorless to z light yellow or brown. Here you will learn how gia diamond grades are established and how those grades affect the diamond s price. Color scale clarity scale.

This short video explains the gia clarity scale and how gia classifies diamonds with a clarity grade ranging from flawless to i 3 by using a 10x magnification loupe and a microscope to see and plot the diamond s inclusions. Arcane systems used grades of a c 1 3 and i iii etc. Diamond quality charts and rating scales illustrated. Every diamond certified by the gia undergoes a thorough independent evaluation.

The gia laboratory issues diamond grading reports for loose natural diamonds in the d to z color range that weigh 0 15 carats or more. A well cut diamond has better light return which results in better sparkle and brilliance.