Diamond Ring Rating Scale

Diamond quality charts and rating scales illustrated.

Diamond ring rating scale. 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. 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. Classification of diamond color on a d colorless z tinted scale. The gemological institute of america gia color scale is the industry standard for diamond grading.

A well cut diamond has better light return which results in better sparkle and brilliance. Many people ask why the gia diamond grading scale starts at d. 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. For people who are in a time crunch here s a summary of the diamond rating scales and charts for your convenience.

Color scale clarity scale. Gia diamond grading reports are not issued for laboratory grown diamonds diamond simulants mounted diamonds or those that have undergone unstable treatments such as fracture filling or coating. Arcane systems used grades of a c 1 3 and i iii etc. Here you will learn how gia diamond grades are established and how those grades affect the diamond s price.

Many inclusions and blemishes are too tiny to be seen by anyone other than a trained diamond grader. Each of the four c s carat weight cut color clarity is accompanied by a diamond chart illustrating the differences between grades.