Natural Diamonds | Diamond Stone – GIA C
Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA.
Diamond Cut: The Wow Factor
The GIA Cut Grading System, introduced in 2005 and validated by thousands of observations by retailers, manufacturers and the public who looked at real diamonds and
How Diamond Treatments Can Impact Color, Clarity and Value of
As diamond science advances, so does the sophistication of the treatments, potentially making them harder to detect without the advanced testing conducted at a reputable gemological
How to Make Your Diamond Engagement Ring Look Bigger
Discover ring settings that make diamonds look bigger. Learn what works and find out which diamond cut looks biggest. Get expert tips on maximizing sparkle.
Diamond Clarity | GIA 4Cs
The clarity of a diamond is based on the size, location, visibility and number of inclusions or blemishes. Internal and surface reaching characteristics are called inclusions.
GIA Diamond Grading Scales: The Universal Measure of Quality
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
Diamond History and Lore
Diamond''s splendor has been appreciated for centuries, but there was not much scientific knowledge about it before the twentieth century. Since then, diamond knowledge has grown
Home | GIA 4Cs
While choosing a diamond is a very personal decision, evaluating a diamond should always be a matter of precision. At GIA, we are incredibly proud that our 4Cs of diamond quality continue
GIA Diamond Origin
A diamond''s journey is every bit as fascinating as its sparkle. GIA''s Diamond Origin and its related resources help you tell the story of the people in the country who brought you your diamond
Understanding the 4Cs of Diamond Quality
GIA''s 4Cs transformed the way diamond quality is determined and communicated, forever changing how diamonds are evaluated, bought and sold. The 4Cs are for everyone.