Celtic Knot Black Onyx Engagement Ring Set in Solid 14K Yellow Gold

Some love stories are written in light; this one is carved in shadow and gold. The Celtic Knot Black Onyx Bridal Set pairs a 1.4 carat pear-cut natural black onyx with intricate knotwork in solid yellow gold — a gothic Celtic engagement ring set for couples who want their forever to look nothing like anyone else’s.

The knot with no beginning and no end

Celtic knotwork is drawn as a single unbroken line — no start, no finish — which is why it has symbolized eternity and interwoven lives for more than a thousand years. Here that ancient pattern wraps the center stone in warm solid gold, turning the setting itself into a vow. It is the kind of symbolism that anchors our Celtic engagement rings, carried into a two-ring bridal set where the contour band continues the knot across both rings.

A pear of pure midnight

The center stone is natural black onyx, cut as a 1.4 carat pear — a shape that tapers to a point like a drop of ink caught mid-fall. Onyx does not sparkle the way a faceted white stone does; instead it holds a deep, glassy, mirror-black luster that makes the gold look warmer and the moissanite look brighter by contrast. If dark stones speak to you, our guide to black onyx meaning traces the stone’s history from Roman signets to modern bridal jewelry, and the full black onyx engagement rings collection shows how versatile this gem can be.

Moissanite light against onyx dark

The accent stones are moissanite — a real lab-grown gemstone (silicon carbide) prized for throwing even more fire than diamond. Against the matte-dark onyx, those small bursts of rainbow-white brilliance read like stars against a night sky. It is an honest pairing: a natural dark gem and a genuine created gem, each doing what it does best, with no imitation involved.

Gothic romance, heirloom build

Dramatic without being costume, this set belongs to the world of gothic engagement rings — dark stones, symbolic metalwork, and a silhouette that feels pulled from an older century. Our guide to gothic wedding rings explores how couples style dark bridal jewelry for the big day, and if you are still deciding whether an unconventional stone is right for you, the non-traditional engagement ring guide is a helpful place to start. As a complete duo it also sits alongside our other wedding ring sets for women.

Choose your karat: 10K, 14K, or 18K solid yellow gold

Both rings are crafted in solid yellow gold all the way through — never plated, never hollow — and you choose the karat from the drop-down. 10K is the hardest and most affordable; 14K is our most popular balance of durability and rich color; 18K carries the highest gold content and the deepest, warmest hue. Other gold colors are available on request. For a full breakdown, see the 10K vs 14K vs 18K karat comparison guide.

Specifications

Sizing & care

Choose your size from the drop-down menu. Sizing can vary slightly between jewelers — often up to half a size between ring sizers and mandrels — so if you are unsure, check our ring size guide before ordering.

Care is simple: clean the onyx with a soft, damp cloth and mild soap, avoid harsh chemicals, ultrasonic cleaners, and prolonged soaking, and store the set separately from harder jewelry so the polished black surface keeps its mirror luster. Solid gold needs nothing more than the same gentle wash.