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At Tiffany, we cut our own diamonds. We take the world’s highest quality rough diamonds and put them in the hands of the world’s best stonecutters. These skilled artisans craft the best-proportioned diamonds instead of the heaviest diamonds, ensuring that each and every stone’s full potential is unlocked. They ensure the precise positioning, shape and angle of each of the diamond’s facets to maximize brilliance and fire.

Tiffany diamond cutters refuse to compromise. When the choice is size or beauty, we always choose beauty, so that we outshine all others.

Tiffany’s diamonds are brighter and more vibrant because we craft them that way. And only the most perfectly cut diamonds earn the right to be placed in the legendary Tiffany Blue Box®.

In fact, we are so confident in the superb quality of our diamonds that we stand behind them with a lifetime warranty.

Deep Diamond Cut
Too Deep
Diamond Cut with Perfect Proportions
Perfect Proportion
Shallow Diamond Cut
Too Shallow
Diamond Cut with Perfect Symmetry
Perfect Symmetry
Diamond with Off-Center Table and Misaligned Facets.
Off-Center Table and Misaligned Facets

Find your perfect ring

The gemological standards in this guide refer only to round brilliant diamonds from .18 to 2.99 carats set in certain ring styles. Round brilliant diamonds smaller or larger, fancy-shaped diamonds and fancy color diamonds each have their own specially tailored standards of evaluation. Consult your Tiffany Sales Professional for details.

Looking to learn more?

Our new wise and witty video series is here to help you find the perfect Tiffany diamond engagement ring.

Watch the 4cs come to life

Ready for your next step?

Now that you know your round brilliant from your cushion cut, the real romance starts. Use your new know-how to find a style that’s just right for your true love.

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Read the Tiffany guide to “Yes!”
Square diamond ring.