Understanding the 4Cs of Diamond Quality | Diamond Factors - GIA 4Cs
The 4Cs and GIA International Diamond Grading System ™ established scientific methods for diamond grading, creating a universal language for communication, and most importantly, ensuring diamond customers know exactly what they are purchasing.
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At GIA, we know diamonds. We created the 4Cs of diamond quality and the GIA International Diamond Grading System™ used worldwide for grading diamonds. Top museums and auction houses trust us to evaluate their finest treasures, and our reports are recognized internationally.
GIA Diamond Grading & Reports | GIA 4Cs
GIA offers the world's most rigorous assessment of the 4Cs and grades every diamond with the same care, expertise and strict guidelines.
The 4Cs of Diamond Quality | The Most Important C Explained - GIA 4Cs
Diamond quality is determined by a combination of all the 4Cs. You might easily see the difference in color between the D-color and Z-color diamonds, which represent the extreme ends of the GIA Color Scale.
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.
Diamond Clarity | GIA 4Cs
Diamond clarity grades are based on the number, size, relief, nature, and location of characteristics. The clarity rating of a diamond is a reflection of the overall appearance of the stone – although many of these characteristics will likely not be visible to the naked eye.
GIA’S 4CS GUIDE TO UNDERSTANDING DIAMOND QUALITY - GIA 4Cs
As creator of the 4Cs and the International Diamond Grading System,™ GIA is the global authority and trusted source for unbiased diamond quality assessment. This guide is devoted to helping you choose both well and wisely when shopping for a diamond.
Diamond Color Chart: The Official GIA Color Scale - GIA 4Cs
In this post, you can learn about and download the official GIA Color Scale, work with an interactive diamond color chart to see the relationship between grades and colors, and watch a useful GIA Diamond Color Grading video to see how GIA evaluates diamond color.
The History of the 4Cs of Diamond Quality
Learn the history of the 4Cs of diamond quality and find out how GIA's global standards for determining diamond color, clarity and cut came to be.
What is Diamond Color & What it Means - GIA 4Cs
The correct way to evaluate diamond color is in precise conditions, under controlled lighting, where stones are compared to masterstones with established color grades. Once properly evaluated, color is documented based on the GIA D-to-Z Color Scale.
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