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GIA Diamond Grading Scales: Universal Quality Measure | GIA 4Cs
The prospect of purchasing a diamond may seem daunting, but through GIA, an unbiased authority on diamonds, you have several handy resources to help you select the highest quality diamond. First up, an overview of the 4Cs: Color, Clarity, Cut, and Carat Weight.
GIA Diamond Grading & Reports | GIA 4Cs
Viewed in a standardized environment, every diamond’s color is graded against masterstones. Multiple GIA graders independently evaluate each diamond and use our proprietary grading technology.
Diamond Rating & Grading Charts | Diamond Classification
This diamond rating chart can help you choose the right gem. Learn the color and clarity criteria by which diamonds are graded for valuation purposes.
Diamond 4Cs Guide: Carat, Color, Clarity, & Cut Charts| IGI
Learn the Diamond 4Cs with color, clarity, cut, and carat charts. Explore diamond ratings, grading scales, and consumer diamond education from IGI.
Diamond Grading Scale - Diamond Registry
When you’re buying a diamond, understanding the diamond grading scale is crucial. This scale allows you to evaluate important qualities of a diamond, like its carat weight, cut, clarity, and color.
Diamonds & Diamond Grading
In this online course, you'll get an in-depth understanding of diamonds, including how to grade their color, clarity, and cut.
Diamond Quality Factors
Diamond professionals use the grading system developed by GIA in the 1950s, which established the use of four important factors to describe and classify diamonds: Clarity, Color, Cut, and Carat Weight.
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