learn about Diamonds

select a shape

Brilliant Earth Cushion Diamond Engagement Ring

When selecting a diamond, your first priority is usually to choose a shape. Learn about round brilliant diamonds and fancy shaped diamonds such as princess, emerald, and oval cut diamonds.


the four cs


The skill with which a diamond is cut determines how well it reflects and refracts light. Learn how the balance of precision and craftsmanship unlocks a diamond's unique brilliance and luster.



Color is the natural color or lack of color visible within a diamond. Learn how the amount of color present affects beauty and value.



With most diamonds, there is more than meets the eye! Learn how the presence of natural inclusions and blemishes on and within a diamond impacts its appearance and value.



Carat is the most visually apparent factor when comparing diamonds. Learn how this unique weight scale is used to measure gemstones.


request our diamond education guide

The Brilliant Earth Diamond Education Guide will help you choose the ideal gemstone for your ring. Learn about diamond shapes and the four C’s, as well as how to maximize the value of your diamond to fit your budget.

request the guide

beyond conflict free diamonds

Brilliant Earth Diamond Engagement Ring

We go beyond the industry standard to offer diamonds that originate from ethical and environmentally responsible sources.



Brilliant Earth diamonds are independently verified for quality characteristics and origin. A diamond certificate or grading report provides an expert opinion on the quality of the diamond and is provided by an independent gemology lab. Trained gemologists with specialized equipment measure the weight and dimensions of the diamond and assess quality characteristics such as cut, color, and clarity. Brilliant Earth diamonds are certified by the world’s leading gem grading labs including GIA, IGI, and GCAL. Please contact us to request an electronic copy of a diamond's lab certificate. Brilliant Earth loose diamonds and diamonds set in create your own diamond engagement rings also come with an origin card.