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.
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.
How to Buy a Diamond | GIA 4Cs
The beauty of a diamond can be most accurately evaluated through the 4Cs. Cut. Color. Clarity. Carat weight. Originally coined by GIA founder, Robert M. Shipley, the 4Cs ensure the most accurate diamond evaluation possible, taking into account everything from sparkle to size.
The 4Cs of Diamond Quality | Gemological Institute of America - GIA 4Cs
of Diamond Quality. The universal method for assessing the quality of any diamond, anywhere in the world.
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.
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.
GIA Diamond Grading | GIA 4Cs
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. GIA created the language for diamond grading that is universally used.
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