Sapphire Color Grading Scale

Check for symmetry windowing and extinction. When most people inquire about the grading classification of a sapphire they expect that it will have a similar standardized system as diamond grading. Sapphires come from a family of gemstones called corundums.

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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.

Sapphire color grading scale.

Of course to measure a gem s carat weight you only need an accurate scale calibrated to measure small objects like gemstones. Each category has its own color range causes of. Again the best ruby and sapphire grading tools are your eyes and perhaps a loupe. Different grading systems are used to determine the quality of this precious gemstone depending on what factor is being graded.

Color is the most important. Analysis grading. Gemologists in their color grading of sapphires rubies. 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. More ruby and sapphire grading tools. The price of a sapphire varies greatly with its quality. The charts explain the color grading system used by all gia g g.

Look out for bulging areas and a thick pavilion. 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. 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. Sapphire ring co has incorporated the official gia sapphire and ruby color map below.

Hue tone saturation. Natural sapphires are graded and valued by a few factors.

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