Every Diamond is Unique
Each reflects the story of its arduous journey from deep inside the earth to a cherished object of adornment. Yet all diamonds share certain features that allow us to compare and evaluate them. These features are called the 4Cs.
As a creator of the Diamond 4Cs and the International Diamond Grading System™, GIA is not only a global authority but the world’s trusted source for an unbiased diamond assessment.
Diamond Color Actually Means "Lack of Color".
GIA’s D-to-Z diamond color-grading system measures the degree of colorlessness by comparing a stone under controlled lighting and precise viewing conditions to "masterstones" of established color value.
How Did the Carat Sistem Start?
The modern carat system started with the carob seed. Early gem traders used the small, uniform seeds as counterweights in their balance scales. The carat has the same gram weight in every corner of the world.
Diamond Clarity Refers to the Absence of Inclusions, Blemishes, and Imperfections.
While no diamond is perfectly pure, the closer it comes, the higher its value.
A Diamond’s Cut Unleashes Its Light
Precise artistry and workmanship are required to fashion a stone so its proportions, symmetry, and polish deliver the magnificent return of light only possible in a diamond.
Explore The 4C's of a Diamond
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"When Choosing a Diamond - Look for a Diamond that Speaks to You"