These princess cut ring settings place a triangular trillion side stone on each side of the square center, which you choose in the next step. The side stones are lab-grown diamonds. Choose a classic three stone band or a split shank version, in white, yellow or rose gold, platinum, or Silvadium, a tarnish-resistant sterling silver.



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
A trillion is a triangular cut. Set with one flat side against a princess cut center, it continues the square's straight lines, so the three stones read as one long, angular shape across the finger. This is a three stone ring: the center plus two lab-grown diamond trillions. The trillions add width and sparkle without competing with the center, and their points draw the eye toward it.
The simpler style sets the three stones on a single band. The split shank style divides the band into two strands as it meets the stones, which opens up the space around them and gives the ring a wider face. Both suit a princess cut diamond ring with trillion side stones, and both hold the center at its four corners, where a princess cut needs protection.
Gold comes in 10K, 14K or 18K, and platinum and silver are offered too. The center can be white or a fancy color such as blue, pink, green, yellow or black. The price shown is for the setting only: settings start under $450, and most are about $1,250. The center is priced when you choose it.
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.