A Promise, Perfected

8 Carat Radiant Cut Rings

An 8 carat radiant-cut lab-grown diamond center comes set in every ring on this page, and the price covers it. Pick a solitaire on a plain or pavé band, a halo, a hidden halo, a three stone ring, or marquise and pear side accents. Each 8 carat radiant lab-grown diamond ring is made in white, yellow or rose gold or in platinum.

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

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Buying guide

Living with an 8 carat radiant

At 8 carats a radiant cut covers much of the finger, and its brilliant facets throw sparkle while the straight sides keep the look tailored. The cropped corners make it more chip-resistant than a sharp-cornered square, which is reassuring on a stone this large. Lab-grown diamonds rank 10 on the Mohs scale, the same as mined diamonds, so the center is built for everyday wear.

Setting options

  • Solitaire: a thin plain band, a rounded plain band or a pavé band.
  • Halo: a frame of small lab-grown diamonds over a three-row pavé band.
  • Hidden halo: a row of small stones under the center, seen from the side.
  • Three stone and side accents: three stones across, or marquise or pear accents with round ones.
  • Cathedral and vintage: arches over a graduated pavé band, and a vintage-inspired filigree style.

Gold, platinum and price

Gold comes in 10K, 14K or 18K in white, yellow or rose; platinum is dense and naturally white, and it holds prongs firmly around a large center. Bands run from about 1.8 to 2.8 mm, and every style offers a 2.2 mm band. Rings start from about $13,700 with the center included, and most cost between about $14,000 and $14,300.

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.