A Promise, Perfected

2.5 Carat Solitaire Rings

Every ring here holds a 2.5 carat lab-grown diamond center, already set and included in the price. Choose from ten shapes, from round and oval to emerald, pear and heart, in white, yellow or rose gold or platinum. The solitaire look leads, with plain, rounded or pavé bands, and a few designs add a hidden halo or a cathedral setting.

1Choose a setting
Choose a Setting
Browse signature ring designs
2Select a diamond
Select a Diamond
Filter by shape, carat & budget
3Complete the ring
Complete the Ring
Preview & make it yours
Find Your Cut

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160 rings
160 rings
Conflict-Free
Ethically sourced diamonds
Lifetime Warranty
Free cleaning & resizing
Free Shipping
30-day returns
IGI / GIA Certified
Independently graded

Buying guide

Plain band or pavé band

A 2.5 carat lab-grown diamond solitaire ring puts all the attention on the center stone. Some designs keep the band plain, either flat or rounded for comfort, so the metal frames the center without competing with it. Others line the band with small lab-grown diamond accents in a pavé setting, which adds sparkle along the finger on top of the center's weight. A few go further: a hidden halo tucks a row of small lab-grown diamonds under the center, seen from the side, and a cathedral design lifts the center on arched shoulders above a graduated pavé band.

Choosing a shape at 2.5 carats

At this size the shape changes how big the stone looks. Oval, pear, marquise and emerald cuts spread their weight over more length, so they can look larger on the hand than a round stone of the same weight. Round brilliants return the most sparkle, and princess cuts come close. Emerald and Asscher cuts have long, step-cut facets with a clean, glassy look that shows inclusions more easily. Cushion, radiant and heart shapes sit between those looks.

Metals and price

Gold comes in 10K, 14K or 18K white, yellow or rose gold, and every design is also offered in platinum. Prices start from about $1,800, and most rings sit between about $1,800 and $1,950 with the lab-grown diamond center included. Higher karats and platinum cost more. Lab-grown diamonds cost far less than natural diamonds of the same size, which keeps a 2.5 carat solitaire engagement ring within reach.

Made to order

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.