Diamond Cut Rating

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

Diamond cut rating.

Diamond clarity is the quality of diamonds that relates to the existence and visual appearance of internal characteristics of a diamond called inclusions and surface defects called blemishes clarity is one of the four cs of diamond grading the others being carat color and cut. Well cut diamonds are brighter than poorly fashioned ones even if they re of equivalent size color and clarity. For people who are in a time crunch here s a summary of the diamond rating scales and charts for your convenience. 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.

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. Diamond quality charts and rating scales illustrated. For standard round brilliant cut diamonds falling in the d to z color range the report also includes a. 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.

Each of the four c s carat weight cut color clarity is accompanied by a diamond chart illustrating the differences between grades. Of the 4cs cut is the biggest factor in determining a diamond s sparkle and beauty. In general the brighter a diamond is the higher its grade will be. A diamond cut is a style or design guide used when shaping a diamond for polishing such as the brilliant cut cut does not refer to shape pear oval but the symmetry proportioning and polish of a diamond.

How does pavilion depth affect a diamond s cut. 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. 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. Which grade diamond cut is the best.

Very good grade round diamonds will also offer excellent brilliance and sparkle. Every diamond certified by the gia undergoes a thorough independent evaluation. 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. Cut grades however aren t universal.

This means if it is cut poorly it will be less luminous. Inclusions are solids liquids or gases that were trapped in a mineral as it formed. Look for red blue yellow or orange flashes as you. A well cut diamond has better light return which results in better sparkle and brilliance.

Classification of diamond color on a d colorless z tinted scale.