Frequently Asked Questions

Which "C" is the most important?

The 4Cs — colour, clarity, cut and carat weight — are the globally accepted standards for assessing the quality of a diamond.


A diamond's quality depends on a combination of all the four "Cs." However, Tiffany & Co. believes the most critical of these is cut. More than any other factor, cut determines the brilliance, fire and overall beauty of your diamond.

To learn more about the 4 Cs, visit our Tiffany Guide to Diamonds.