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 centre.

The centre is a calibrated lab-grown oval diamond, F–G colour 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. From $1,479 for the complete ring, centre included — the price on this page is the ring, 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 the size is wrong we resize it free in the first year. It arrives boxed and ready to give. Every ring is made to order, which also means the person wearing it can change the metal or the centre size afterwards with a conversation rather than a return.

Every order ships via complimentary insured UPS Express, signature required on delivery. Ready-to-ship pieces leave us in 2–3 business days; made-to-order pieces in 5–10. Returns accepted within 30 days, and every piece carries our free lifetime warranty.