Bold as midnight, refined as candlelight. This princess cut black onyx ring set centers a deep, glossy jet-black onyx — squared off in a crisp princess cut and framed by a shimmer of simulated diamonds. Crafted in solid 925 sterling silver with a bright rhodium finish, it is a vintage-inspired black onyx engagement ring and matching band for anyone who wants a proposal with a little darkness and a lot of drama.
Natural black onyx
Princess cut center
Solid 925 sterling silver
Rhodium finish
Matching ring set
Free velvet gift box
A dark-romance take on the classic set
Where most engagement sets reach for clear white stones, this one reaches for shadow. The squared princess-cut onyx reads as sleek and architectural, while the simulated diamond accents trace a glittering frame around it — light against dark, the whole appeal of the piece in a single glance. It belongs among our black onyx engagement rings for the bride who wants something unmistakably her own, and it sits just as naturally in our gothic engagement rings for lovers of a moodier aesthetic. Worn as a pair, the two rings frame the onyx from both sides so the black stone appears to float on a bed of silver light.
The engagement ring
Holds the princess-cut natural black onyx in a diamond-accented setting — the statement piece and focal point of the set.
The matching band
A slender coordinating band that nests alongside the engagement ring for a complete stacked look, and pairs beautifully with styles from our black onyx couples rings.
The natural black onyx
Onyx is a natural chalcedony — a form of quartz — prized for centuries for its dense, even, jet-black color and glassy polish. This is natural black onyx, not glass or resin, with a hardness of roughly 6.5 to 7 on the Mohs scale that makes it well suited to a ring you actually wear. The princess cut gives that midnight surface clean corners and a mirror-flat table, so it catches light in a sharp, contemporary way. To understand the lore behind the stone, our guide to black onyx meaning is a rich place to begin, and our black gemstones guide shows how onyx compares to other dark stones.
A frame of simulated diamonds
Ringing the center stone, bright simulated diamonds add a crisp flash of white sparkle that makes the black of the onyx look even deeper and glossier. It is a smart, budget-friendly way to bring classic engagement-ring shimmer to a non-traditional design, and the contrast of clear light against pure black is what gives this set its vintage-glamour edge. Prefer a lab-grown diamond or moissanite accent instead? Message us — most of our designs can be upgraded.
Solid sterling silver with a rhodium finish
The set is crafted in solid 925 sterling silver and finished with a layer of rhodium — the same precious metal used on fine white-gold jewelry. That rhodium finish gives every ring a bright, mirror-white luster and adds a protective shield that helps resist tarnish and everyday scratches, keeping the silver looking freshly polished against the dark stone. It is the detail that lets a sterling silver set wear like something far more expensive.
What black onyx symbolizes
Onyx has long been regarded as a stone of strength, protection and steady resolve — a grounding talisman said to absorb tension and lend its wearer quiet confidence. That makes it a fitting emblem for a partnership built to weather anything, and a meaningful alternative to the usual proposal stone. Because onyx is also a traditional birthstone alternative for December and a favorite of the fall aesthetic, you can read more in our October birthstone guide.
Specifications
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Metal Solid 925 sterling silver with rhodium finish
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Center stone Natural black onyx (chalcedony), Mohs ~6.5–7
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Stone cut Princess cut (square), approx. 5.0 x 5.0 mm / ~1.4 ct
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Accents Simulated diamonds
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Style Vintage-inspired, dainty, two-piece set
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Set includes Engagement ring + matching band
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Finish High-polish, rhodium-plated
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Personalization Optional engraving (up to 16 characters)
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Sourcing Ethically sourced, conflict-free stones
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Included Free luxury velvet gift box & lifetime warranty
Sizing & care
Choose your size at checkout. If you are between sizes or unsure, we are happy to help — and if the fit is not quite right, resizing is available and starts from a modest fee. To keep the onyx and rhodium finish at their brightest, remove the rings before showering, swimming or applying lotions, avoid harsh chemicals and ultrasonic cleaners, and store them in the velvet box when not worn. A soft, dry cloth restores the shine beautifully. With gentle care, this is a set made to be worn every day.
Frequently asked questions
Is the black onyx natural?
Yes. The center is a natural black onyx, a form of chalcedony quartz with a deep, even jet-black color and a glassy polish. It is a genuine natural stone, never glass or plastic.
Does this come as a set?
Yes — it includes the princess-cut black onyx engagement ring plus a matching band designed to nest alongside it for a complete stacked look. The band can also be worn on its own.
What are the accent stones?
Bright simulated diamonds frame the center, adding a crisp white sparkle that makes the black onyx look even deeper. If you would prefer a lab-grown diamond or moissanite accent, reach out and we will tailor it for you.
What metal is it made from?
Solid 925 sterling silver, finished with rhodium for a bright white luster and extra protection against tarnish and scratches.
What does the rhodium finish do?
Rhodium is the same precious metal used to finish fine white gold. It gives the silver a mirror-bright shine and adds a protective layer that helps the ring stay looking freshly polished against the dark onyx.
Is black onyx durable enough for daily wear?
Yes, with normal care. Onyx sits around 6.5 to 7 on the Mohs scale, so it wears well day to day. Avoid hard knocks and remove the rings for rough activities to keep the polished surface pristine.
Can it be a non-traditional engagement ring?
Absolutely. A black onyx engagement ring is a bold, elegant alternative to a clear-stone solitaire, and the princess cut gives it a crisp, contemporary silhouette perfect for a modern or vintage-inspired proposal.
What does black onyx symbolize?
Onyx is associated with strength, protection and grounded confidence, which makes it a meaningful choice for a partnership built to last. Many wearers are also simply drawn to its dark, dramatic beauty.
Will the silver turn my finger green?
No. Genuine 925 sterling silver with a rhodium finish will not discolor your skin. Green marks come from low-quality or plated base metals, never from real sterling silver.
Can it be engraved?
Yes. You can add a personal engraving of up to 16 characters at checkout — a date, initials or a short message. Engraved pieces are final sale, so please double-check spelling.
What size should I order?
Select your ring size at checkout. If you are unsure or between sizes, contact us for guidance. Resizing is available and starts from a modest fee.
Are the stones ethically sourced?
Yes. All of our stones are ethically sourced and conflict-free, so you can wear your set with complete peace of mind.
Does it arrive gift-ready?
Every order ships in a free luxury velvet gift box and is backed by our lifetime warranty — ready for a proposal or to give as a keepsake.
