Clarity of a Diamond

Diamond Clarity Refers to the Absence of Inclusions and Blemishes

Natural diamonds are the result of carbon exposed to tremendous heat and pressure deep in the earth. This process can result in a variety of internal characteristics called 'inclusions' and external characteristics called 'blemishes.'

Evaluating diamond clarity involves determining the number, size, relief, nature, and position of these characteristics, as well as how these affect the overall appearance of the stone. While no diamond is perfectly pure, the closer it comes, the higher its value.

Flawless (FL)
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No inclusions and no blemishes visible under 10x magnification

Internally Flawless (IF)
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No inclusions visible under 10x magnification

Very, Very Slightly Included (VVS1 and VVS2)
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Inclusions so slight they are difficult for a skilled grader to see under 10x magnification

Very Slightly Included (VS1 and VS2)
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Inclusions are observed with effort under 10x magnification, but can be characterized as minor

Slightly Included (SI1 and SI2)
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Inclusions are noticeable under 10x magnification

Included (I1, I2, and I3)
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Inclusions are obvious under 10x magnification which may affect transparency and brilliance

Carat Weight

Diamond carat weight is the measurement of how much a diamond weighs. A metric "carat" is defined as...

Color

The diamond color evaluation of most gem-quality diamonds is based on the absence of color. A chemically pure and...

Cut

A diamond's cut is crucial to the stone's final beauty and value. And of all the diamond 4Cs, it is the most...