Guide to Understanding Diamond Quality and GIA Diamond Grading Reports


Beautiful. Rare. Cherished. Diamonds are the most sought-after gems on earth. Each one is unique. And each has specific qualities that establish its value. A GIA Diamond Grading Report gives you clear, comprehensive understanding of those qualities.

As 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 unbiased assessment.

This site is devoted to helping you choose both well and wisely when shopping for a diamond.

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