Oval Lab-Grown Diamond Cathedral Split-Shank Engagement Ring

A split shank does one job well: it opens a gap under the oval so light gets in from underneath instead of dying against a solid band. This one carries the cathedral arch up into that split without a single accent stone, which is why it reads clean at arm's length and why it is the least expensive way into this collection. Nothing here competes with the center.

The center is a calibrated lab-grown oval diamond, F to G color and VS clarity, offered at 0.40 / 0.75 / 1.10 carats. Calibrated means the stone is cut to a size class rather than sold as a single numbered stone: the carat shown is the class nominal, and the diamond you receive falls inside a tight published range around it. That is the reason this ring costs what it does. If you would rather have an individually selected, individually certificated diamond in this same setting, we will source one and quote it.

Made in 14K White Gold, 14K Yellow Gold, 14K Rose Gold and platinum, then cut and set to your finger size after you order. The price on this page is the complete ring, center included, not a mounting you then have to fill.

If this is a gift, the practical notes: we build it to your ring size, so nothing has to be guessed at the moment it matters, and if you are unsure of the size, our concierge can help you confirm it before you order, since rings are made to size and are final sale. Every ring is made to order for you, so it is worth confirming the size, metal and center before you order; our concierge is glad to help.

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.