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GIA Diamond Grading Scales: The Universal Measure of Quality - 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.
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.
GIA Diamond Grading
The GIA Diamond Grading Report. This report uses the universally accepted GIA standards to determine a natural diamond’s shape, color, clarity, cut and carat weight – as well as proportions, finish and treatments.
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.
Understanding the 4Cs of Diamond Quality - GIA 4Cs
GIA’s diamond grading provides the consistent and unbiased results that the global diamond industry and diamond customers trust. Without strict standards, the characteristics, quality and value of a diamond would be left open to interpretation.
Colored Diamonds: Diamond Grading & Reports | GIA 4Cs
The GIA Diamond Grading Report. This report uses the universally accepted GIA standards to determine a natural diamond’s shape, color, clarity, cut and carat weight – as well as proportions, finish and treatments.
Analysis & Grading - GIA.edu
D-to-Z diamonds, offering details such as estimated total carat weight, color and clarity ranges. Each report includes metal testing, item weight, markings, and a photo of the jewelry.
Home | GIA 4Cs
For nearly 100 years, GIA has helped advance the global diamond industry through innovation and education. A GIA Diamond Grading Report is more than the standard in diamond evaluation—it is the internationally trusted source for diamond quality reporting by jewelers, museums and auction houses.
Study Diamonds at GIA
Through a unique combination of hands-on training, one-on-one coaching and multimedia, the Diamond Grading lab class explores how to grade diamonds consistently and accurately using a modern gem microscope and a loupe.
How GIA Grades Diamonds
Learn about GIA's processes to ensure the most accurate and ethical diamond grading results.
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