Diamonds

The 4Cs of Diamonds: Diamond Quality Guide

Jeweler evaluating a one carat round diamond for the 4Cs of diamonds.

The “4Cs” of diamonds are cut, color, clarity, and carat weight. This guide explains what the 4Cs are, why some are more important than others, and how each one affects a diamond’s appearance, quality, value, and price.

Diamond Cut: How to Pick the Best and Sparkliest

Choosing the best diamond cut

Of the 4Cs of diamonds – cut, color, clarity, and carat weight – the most important is cut. Learn what diamond cut is, how diamond cut grades are scored, and what you need to know to pick a knockout rock with superior brilliance, fire, and sparkle.

Diamond Carat Size Chart & Buying Guide

Diamond carat weight and diamond carat guide.

Diamond carat weight is not the same as diamond size. Though there’s definitely a correlation between weight and size, the size of a 1 carat diamond, for example, can vary significantly depending on its shape and cut.

The Top 12 Most Popular Diamond Shapes

Different diamond shapes to choose for an engagement ring.

The most popular and well-known diamond shapes are the round brilliant, princess, oval, cushion, emerald, Asscher, marquise, radiant, pear, heart, baguette, and trillion cut diamond. Learn about their appearance, characteristics, pros, cons, and more.