Diamond Cut Rating Scale

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

Diamond cut rating scale.

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. The 4cs means two very important things. 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. Diamond clarity scale share because our focus is always on protecting the consumer we took the traditional clarity scale one step further than the traditional scales and added a numerical scale to correspond to the industry standard verbal descriptors as a 0 10 scale.

Classification of diamond color on a d colorless z tinted scale. Each of the four c s carat weight cut color clarity is accompanied by a diamond chart illustrating the differences between grades. Diamond quality can be communicated in a universal language and diamond buying consumers can know exactly what they are about to purchase. Gia created the 4cs color clarity cut and carat weight as a universal method for establishing the quality of any diamond anywhere in the world.

Conversely a well cut diamond can have a slightly lower color g h or clarity si1 si2 and still look quite beautiful due to its superior ability to create sparkle and. When writing the grades of a diamond using the ags scale diamond cut grade is first then diamond color clarity then carat weight in that order. For standard round brilliant cut diamonds falling in the d to z color range the report also includes a. 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. 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. The gia diamond cut scale for standard round brilliant diamonds in the d to z diamond color range contains 5 grades ranging from excellent to poor and is the definitive scale for classifying diamond cuts. A well cut diamond has better light return which results in better sparkle and brilliance.