Lab Diamond Cushion

This collection holds loose cushion cut lab grown diamonds: square to slightly rectangular stones with softly rounded corners, sold on their own rather than set in jewelry. Sizes run from about a third of a carat up to five carats.

Colors and clarity

Colorless stones range from D to I color, with clarity from VVS1 to SI1. There is also a large choice of fancy colors: vivid and intense pink, yellow, orange and green, plus brown pink and orange brown tones. Each listing names the carat weight, color and clarity of that stone in its title, and some also name a grading report.

How to choose a cushion cut stone

Cushions vary in outline from almost square to clearly rectangular, so decide which shape you prefer first. Look at the carat weight together with the color grade: in fancy colors, a stronger word such as vivid or intense means deeper color. Rounded corners make cushions less prone to chipping than sharp-cornered shapes. Looking for a finished ring instead? Browse our lab diamond engagement rings, solitaire rings and halo rings.

FAQs

Are these real diamonds?

Yes. Lab grown diamonds are real diamonds with the same chemistry as mined ones. Our comparison guide explains how they differ from moissanite.

How big will the stone look?

Our diamond size chart shows typical face-up sizes by carat weight, which helps you compare stones.

Is the stone set in jewelry?

No. These are loose stones sold on their own. Our support team (10 am to 7 pm) can answer questions about a stone before you order.