Sapphire Color Grading Scale

Look out for bulging areas and a thick pavilion.

Sapphire color grading scale.

Color is the most important. Each category has its own color range causes of. Check for symmetry windowing and extinction. Again the best ruby and sapphire grading tools are your eyes and perhaps a loupe.

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. Gemologists in their color grading of sapphires rubies. Natural sapphires are graded and valued by a few factors. 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. 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. More ruby and sapphire grading tools. 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.

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. Sapphires come from a family of gemstones called corundums. Sapphire ring co has incorporated the official gia sapphire and ruby color map below. Analysis grading.

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 explain the color grading system used by all gia g g.