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Cushion Cut Lab Grown Diamonds

With its soft, romantic charm, a cushion cut lab grown diamond features a square or elongated shape with rounded corners, blending elements of both round and princess cut diamonds.

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A curated assortment of our most innovative diamonds

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A cushion cut lab grown diamond features soft rounded edges that differentiate them from more angular square or rectangular diamond shapes. Refined over centuries from the old mine cut, cushion cut diamonds are a timeless, romantic choice. Each lab grown cushion cut diamond waiting to be set is Beyond Conflict Free™, ensuring customers that Brilliant Earth diamonds are sourced with only the highest standards in mind, furthering our mission to cultivate a more ethical, transparent, sustainable, and compassionate jewelry industry.


Pairing a cushion cut lab grown diamond with the right setting is an imperative step in the creation of your ring. Choose from an expansive collection of settings that range in style from simple solitaires to luxurious halos. The perfect lab grown cushion cut diamond rings reflect your one-of-a-kind love story, are crafted to be loved for a lifetime, and should be passed down for generations to come.

Cushion lab grown diamonds are available across a wide range of carat weights from under 0.30 ct to 10+ ct, so you can find options for different budgets and ring designs.
Cut grades for cushion lab grown diamonds include designations like Super Ideal, Ideal, Very Good, and Good, reflecting different facet precision and light performance across our inventory.
You can filter cushion lab grown diamonds by carat, cut grade, color, clarity, L:W ratio, fluorescence, price, and report type to compare stones that match specific preferences.
Cushion lab grown diamonds are offered in color grades ranging from D to J and clarity grades from IF down through SI ranges across our collection.
Yes, each cushion lab grown diamond comes with a detailed grading report that lists carat, cut grade, color, clarity, measurements, and proportions from labs such as GIA, IGI, GCAL, or HRD.
Differences in proportions, facet arrangement, pavilion depth, and length-to-width ratio can affect a cushion diamond's face-up appearance and sparkle even when grade labels match.
Yes, many cushion lab grown diamond listings include 360-degree views and high-resolution images, and select stones offer videos to help evaluate their face-up appearance.
Yes, you can add a chosen cushion lab grown diamond to an engagement ring, and a Brilliant Earth jewelry specialist can help with setting compatibility and next steps.
Cushion cut lab grown diamonds pair well with solitaire, halo, vintage-inspired, and three-stone settings, each offering a different emphasis on the stone's rounded corners and faceting.
Cushion L:W ratios typically range from about 1.00 to 1.20 for looks that vary from square to slightly elongated, and the ratio determines the stone's overall outline and visual proportion.

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Elongated Cushion Cut Diamonds

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