Diamond Cut Rating Scale

Here you will learn how gia diamond grades are established and how those grades affect the diamond s price.

Diamond cut rating scale.

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. 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. 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. 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.

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. Diamond quality can be communicated in a universal language and diamond buying consumers can know exactly what they are about to purchase. 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. Diamond quality charts and rating scales illustrated.

Cut grade is the most important factor in determining the overall appearance of a diamond because a poorly cut diamond will seem dull even with excellent clarity and color. The 4cs means two very important things. A well cut diamond has better light return which results in better sparkle and brilliance. Every diamond certified by the gia undergoes a thorough independent evaluation.

Classification of diamond color on a d colorless z tinted 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. For standard round brilliant cut diamonds falling in the d to z color range the report also includes a. 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.