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3 Carat Asscher Cut Platinum Laboratory-Grown Diamond Solitaire Ring with Rounded Plain Band
Price$4,519$9,038Ends Soon
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A 3 carat lab-grown diamond solitaire engagement ring puts all the attention on one stone. Each ring here comes with its 3 carat lab-grown diamond center set and included in the price. Choose from ten shapes, from round and oval to emerald and heart, in white, yellow or rose gold (10K, 14K or 18K) or platinum.
From timeless solitaires to dazzling halos and vintage-inspired designs, explore the most-loved engagement ring settings — and find the style that tells your story.
A single diamond, beautifully unadorned — the timeless, most-loved setting that puts your stone center stage.
Shop Solitaire Rings →A circle of pavé diamonds frames the center stone, adding sparkle and making it look noticeably larger.
Shop Halo Rings →Three diamonds symbolising your past, present and future — a meaningful design with extra brilliance.
Shop Three-Stone Rings →Tiny diamonds set along the band catch the light from every angle for all-over shimmer.
Shop Pavé Rings →Intricate milgrain and antique-inspired detailing, for a ring with timeless, heirloom character.
Shop Vintage Rings →Two interwoven bands of metal and diamonds create a modern, dynamic silhouette.
Shop Twisted Shank Rings →Buying guide
The simplest solitaires sit on a plain band, either thin or rounded. Others add a pavé band of small lab-grown diamond accents running along the shank. A hidden halo version tucks a row of accents under the center, so the top view stays a classic solitaire while the side view sparkles. A cathedral setting raises the center on arched shoulders over a graduated pavé band.
A 3 carat center is large on most hands. A round one measures roughly 9 mm across, and elongated shapes such as oval, pear and marquise look longer still. Because a solitaire has no halo to lean on, the center needs to be secure and the band strong enough to support it. A slightly wider band can help a big center sit level.
Platinum is dense, naturally white and very durable, so it is a popular choice for a large center. White gold looks similar at a lower price and is plated to keep its bright white finish. Yellow and rose gold add warmth around a colorless lab-grown diamond.
Each ring is made for you in 10–15 days. Shipping is free on orders over $500, returns are accepted within 30 days, and one resize is free within 60 days of delivery.
Usually from about $2,100 for the finished ring with its 3 carat lab-grown diamond center set, in the lowest gold option. Most 3 carat solitaire rings here sit between about $2,300 and $2,450. Pavé and hidden halo styles cost a little more than a plain band, and platinum or higher-karat gold adds to the price. A natural diamond of the same size costs far more.
Not for most people, though it is a bold size. A 3 carat round center is roughly 9 mm across and covers much of the width of an average finger. If you want the size without too much height, a solitaire on a plain band keeps the look clean, and an oval or emerald shape spreads the stone along the finger. A sturdier band helps it sit level for daily wear.
