Round Cut Engagement Rings | A. Brandt + Son

Round is the most classic outline for an engagement ring, and antique round diamonds tell that story across the eras. This collection gathers round old mine, old European, and transitional cut diamonds, along with round brilliants in estate settings. Each ring is hand-selected by Annette and Elan Brandt, dated to its era, and authenticity guaranteed.

Why Buyers Trust A. Brandt + Son

For nearly four decades, buyers across the country have trusted A. Brandt + Son for authentic antique and estate jewelry. Many travel to our Narberth showroom to see a piece in person, and every order, near or far, carries the same guarantees.

Authenticity Guarantee

Every piece is hand-selected, dated to its era, condition-graded, and backed by our guarantee.

Complimentary 2-Day Shipping

All domestic orders ship complimentary UPS 2nd Day Air, signature required and fully insured.

Complimentary Sizing

Most antique rings include complimentary sizing, and we say upfront when a setting cannot be sized.

Hassle-Free Returns

If a piece is not right, return it within our window in its original condition, no hassle.

What is the difference between an old European cut and a modern round brilliant?

An old European cut has a smaller table, taller crown, and open culet, so it flashes bold, chunky light. A modern round brilliant is cut for maximum, even sparkle. Many couples prefer the old European for its warmth and authentic period character.

Are round antique diamonds more expensive?

Round is the most in-demand outline, so round antique diamonds can carry a premium over other shapes of similar size and quality. We price each ring on its cut, era, and condition and are glad to compare options across the collection with you.

Can a round antique diamond ring be sized?

Most round solitaires and three-stone rings can be sized, and complimentary sizing is included on the majority of rings we sell. Full-eternity and some delicate settings cannot be sized safely, and we tell you upfront before you buy.

Shop Our Timeless Collections of Antique and Vintage Jewelry

From Georgian rarities to Art Deco engagement rings, A. Brandt + Son brings together antique and estate jewelry you will not find anywhere else. Every collection is hand-selected by Annette and Elan Brandt, dated to its era, and offered with the guarantees that have defined the shop since 1988.

Shop online or visit our Narberth salon, and buy with the confidence of working directly with the family.

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Collection: Round Cut Engagement Rings

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Art Deco Platinum 1.70ct Emerald and Diamond Ring

Art Deco 18k White Gold .86ct Diamond Engagement Ring

Art Deco Platinum Diamond Engagement Ring 3.39ctw

Art Deco 14kt Diamond Engagement Ring 0.75ct

Estate Platinum 3-Stone Diamond Engagement Ring 0.73ctw

Art Deco 18kt Diamond Engagement Ring 0.80ct