Sapphire Color Grading Scale

The price of a sapphire varies greatly with its quality.

Sapphire color grading scale. Gemologists in their color grading of sapphires rubies. Different grading systems are used to determine the quality of this precious gemstone depending on what factor is being graded. When most people inquire about the grading classification of a sapphire they expect that it will have a similar standardized system as diamond grading. Analysis grading.

Sapphires come from a family of gemstones called corundums. Check for symmetry windowing and extinction. These include sapphire color sapphire clarity and also their cut and carat weight a sapphire s country of origin is also taken into consideration when determining its value. Given the lack of a standardized grading system for sapphires it is important to be able to differentiate a superior quality sapphire from an inferior quality one.

Color is the most important. Of course to measure a gem s carat weight you only need an accurate scale calibrated to measure small objects like gemstones. They range from medium to dark reddish purple to violetish purple with weak to vivid color saturation the major fancy sapphire color categories are padparadscha pink and purple orange and yellow green and colorless and black. Look out for bulging areas and a thick pavilion.

More ruby and sapphire grading tools. Sapphire ring co has incorporated the official gia sapphire and ruby color map below. Again the best ruby and sapphire grading tools are your eyes and perhaps a loupe. Standardized grading of color clarity and cutting has never been something that has been established on a uniform basis within the trade or within the various.

The charts illustrate the wide variations in color gradings for sapphire and rubies as well as the three main factors which make up sapphire s color. The charts explain the color grading system used by all gia g g.