--- title: "Round Three Stone Lab Diamond Engagement Ring" description: "A round brilliant lab diamond three-stone engagement ring, in platinum or gold. Made to order in our New York flagship by jewelers with decades of experience." canonical: "https://www.adadiamonds.com/lab-diamond-engagement-rings/three-stone-round-setting-070" last-updated: "2026-11-10" --- # Round Three Stone Setting > A round brilliant lab diamond three-stone engagement ring, in platinum or gold. Made to order in our New York flagship by jewelers with decades of experience. A brilliant classic, this three stone setting features a pair of round lab grown side stones. Available in trellis or basket style. ## Details | Attribute | Value | | --- | --- | | Design number | AD-070 | | Style | Three Stone · Trellis | | Price (setting only) | $2,650 in gold; $2,950 in platinum or two-tone | | Hidden halo | +$1,000 | | Center stone | Sold separately; choose any compatible lab diamond | | Center stone shapes | Round | | Metals | 18k White Gold, 14k White Gold, 18k Yellow Gold, 14k Yellow Gold, 18k Rose Gold, 14k Rose Gold, Yellow Gold | | Platinum and two-tone | Platinum, Platinum & Yellow Gold, Platinum & 18k Yellow Gold, 14k Platinum | | Band widths | 1.8mm, 2.0mm, 2.2mm, 2.4mm | | Band shapes | Rounded, Knife Edge, Tapered, Square, Custom | | Prong styles | Round Prongs, Claw Prongs, V-Prongs, Square Prongs, Dual Round Prongs, Dual Claw Prongs | | Default build | 1.8mm, Rounded, Claw Prongs | | Engraving | Available | | Lead time | Made to order; ships in 3-4 Weeks | | Made in | New York City | ## Pricing Your Choice of Gold: 0.20ct Each Side Stones (0.4ctw): $2,650 USD 0.25ct Each Side Stones (0.5ctw): $2,750 USD 0.30ct Each Side Stones (0.6ctw): $2,900 USD 0.40ct Each Side Stones (0.8ctw): $3,450 USD 0.50ct Each Side Stones (1.0ctw): $3,750 USD _Starting at price is for the setting and side stones only (center stone priced separately) and includes DEF/VS lab grown diamond side stones. Side stones at or below 0.50ct will be uncertified and hand-selected to match your center stone. Side stones above 0.50ct are available upon request and are individually certified. _ _Platinum and two-tone available for an additional $300 fee. This style must be modified to accommodate a mixed-metal setting._ ## Compatible center diamonds - Round: 57 in stock, 1.21–5.03 ct, from $1,325 Browse them: · search by API: ## Shipping and returns - Free shipping in the US; international shipping $75. - 30-day returns by mail ($50 return label). Full terms: ## Images ![Lab Diamonds set in White Gold Round Three Stone Diamond Engagement Ring (Main View)](https://content.adadiamonds.com/image/upload/v1710269383/Lab-Created-Diamonds-in-White-Gold-Round-Three-Stone-Setting_Main-View_Product-Number-070.webp) ![Lab Diamonds Round Three Stone Diamond Engagement Ring in White Gold (Profile View)](https://content.adadiamonds.com/image/upload/v1710269383/White-Gold-Round-Three-Stone-Setting-with-Lab-Grown-Diamonds_Profile-View_Product-Number-070.webp) ![Lab Diamonds Round Three Stone Diamond Engagement Ring in White Gold (Side View)](https://content.adadiamonds.com/image/upload/v1710269382/Lab-Created-Diamonds-in-White-Gold-Round-Three-Stone-Setting_Side-View_Product-Number-070.webp) ![platinum 3.5 ct round lab diamond three stone ring ada diamonds design ad 070](https://content.adadiamonds.com/image/upload/v1691556760/3.5-ct-round-three-stone-lab-diamond-engagement-ring-platinum-ada-diamonds-design-ad-070_1664639049944-CJX09RDBH16XJ7SCJAZR.jpg) ![platinum 3.5 carat round lab created diamond three stone engagement ring ada diamonds design ad 070](https://content.adadiamonds.com/image/upload/v1691556760/3-5-ctw-Diamonds-in-Platinum-Round-Three-Stone-Setting_Profile-View_Product-Number-070.jpg) ![3.0 ctw Diamonds set in White Gold Round Three Stone Diamond Engagement Ring (Main View)](https://content.adadiamonds.com/image/upload/v1718814413/3-ct-Lab-Grown-Diamonds_Round-Three-Stone-Setting_White-Gold_Main-View_Product-Number-070.jpg) --- Canonical URL: