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The Vintage Three-Stone round lab-grown diamond engagement ring in yellow gold.

Round Lab-Grown Diamond Rings

The brightest cut in diamonds.

Round brilliant lab-grown diamonds, from clean solitaires to vintage three-stones.

No cut returns more light than the round brilliant. It is the diamond everyone pictures, and the one that sparkles hardest from across the room.

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18 products

Silver-colored vintage ring with a round center stone, ornate filigree, and milgrain detailing on a white background.
The Vintage Round-Cut Lab-Grown Diamond Ring Sale priceFrom $1,049.00
Round pavé ring in white-metal finish, three-quarter view: colorless round center stone in four claw prongs above a hidden halo, on a slim band with pavé stones along the upper shoulders.
1CT Round Cut Pavé Lab Diamond Eternity Ring Round-Cut Lab-Grown Diamond Ring Sale priceFrom $1,049.00
Rose-gold ring with a round blue center stone, clear accent gems, and sculpted leaf motifs resting on a surface.
The Elowen Round-Cut Lab-Grown Diamond Ring Sale priceFrom $3,147.00
The Bethany - Vintage Round-Cut Lab-Grown Diamond Ring
The Bethany - Vintage Round-Cut Lab-Grown Diamond Ring Sale priceFrom $3,746.00
The Noelle blue moissanite halo ring in rose gold, isolated front view
The Noelle Round-Cut Lab-Grown Diamond Ring Sale priceFrom $4,196.00
2CT Round Cut Eternity Moissanite Ring — Silver hero
The 2CT Round Eternity Round-Cut Lab-Grown Diamond Ring Sale priceFrom $1,948.00
The Opaline 2-carat round cut moissanite ring in solid gold
The Opaline Round-Cut Lab-Grown Diamond Ring Sale priceFrom $2,023.00
Twist pavé round moissanite ring in silver, front product view.
The Twist Pavé Round-Cut Lab-Grown Diamond Ring Sale priceFrom $1,049.00
Vintage moissanite vine ring in silver, isolated product view
The Vintage Vine Round-Cut Lab-Grown Diamond Ring Sale priceFrom $675.00
The Isadora is a vintage-style ring crafted in solid gold, featuring a 1 carat round cut moissanite.
The Isadora Round-Cut Lab-Grown Diamond Ring Sale priceFrom $1,049.00
The Luna 2-carat round moissanite ring in solid gold with a pavé band
The Luna Round-Cut Lab-Grown Diamond Ring Sale priceFrom $2,098.00
Close-up view of The Katalina solid gold ring with its blue moissanite center.
The Katalina Round-Cut Lab-Grown Diamond Ring Sale priceFrom $3,746.00
The Camilla ring with a round cut pink moissanite in solid gold
The Camilla Round-Cut Lab-Grown Diamond Ring Sale priceFrom $5,394.00
Vintage three-stone round-cut moissanite ring in silver, front product view.
The Vintage Three-Stone Round-Cut Lab-Grown Diamond Ring Sale priceFrom $2,398.00
The Nicolette pink moissanite eternity ring in 14K or 18K solid gold.
The Nicolette Round-Cut Lab-Grown Diamond Ring Sale priceFrom $4,196.00
The Bethany 1.5 carat blue moissanite halo ring in solid gold.
The Bethany Round-Cut Lab-Grown Diamond Ring Sale priceFrom $3,746.00
The Althea 1CT round-cut moissanite ring in solid gold with delicate side stones
The Althea Round-Cut Lab-Grown Diamond Ring Sale priceFrom $3,147.00
Solid gold ring with a twisted band and a 1 carat round moissanite center stone.
The Twisted Band Round-Cut Lab-Grown Diamond Ring Sale priceFrom $974.00

The brightest cut in diamonds

The round brilliant's facets are arranged to send almost all the light that enters back to the eye. That is why it is the classic engagement diamond, and why it never dates.

Choose a clean solitaire, a twisting band, a vintage setting with milgrain detail, an eternity-style pavé band or a three-stone. Some open on blue or pink. Browse all shapes in lab-grown diamond rings.

Frequently Asked Questions

Why is the round brilliant so sparkly?

Its facet pattern is built to return the most light of any diamond shape. In a lab-grown diamond you get exactly that performance, because it is the same material.