Emerald-Cut Lab-Grown Diamond Half-Moon Three-Stone Engagement Ring

Half-moon sides close up flat against the center's long edges. Each half-moon side stone has one straight edge and one curved edge. The straight edge sits against the long side of the emerald-cut center, so the three lab-grown diamonds join with almost no gap and form one softly rounded outline. All three are prong-set, with claws over the center's cut corners. The plain band has flat edges and a substantial, tailored feel. Of all the side-stone options, this is the closest geometric match to an emerald cut. It suits a refined, Art Deco eye.

Choose a emerald-cut center from 0.65 to 2.85 carats. Each center is a calibrated lab-grown diamond made to an F-G color, VS clarity specification. Carat weights are nominal and each size has a published range; the 1.10 ct size, for example, runs 1.05 to 1.28 ct. Lab-grown diamonds are real diamonds, chemically and physically the same as mined ones. If you would rather pick an individually graded loose diamond, natural or lab-grown, build it in Design Your Ring.

Available in 14K white, yellow or rose gold, or platinum. The accent diamonds are lab-grown, near-colorless stones matched to the setting. Your ring is made to order in your size (US 4 to 9; see the sizing guide) and arrives by complimentary, insured UPS Express. More emerald-cut settings are in our Emerald Cut Engagement Rings collection.

Every order ships free and fully insured by UPS Ground; orders of $500 or more ship by complimentary UPS Express, signature required on delivery (a $50 upgrade below that). The ship estimate for your selection is shown beside the price.

Rings are final sale. Every ring is made or sized to your ring size, and engagement rings are set with the center stone you choose, so a ring can’t be returned or exchanged for a refund or another size. Please confirm your size before you order; our concierge is glad to help. If a ring arrives damaged, defective or not as ordered, tell us within 7 days and we’ll make it right, and every piece carries our free lifetime warranty against manufacturing defects.