Moonlit blue against the deepest black. This black onyx ring set in solid 925 sterling silver pairs the deep, glossy jet-black of natural onyx with a kite-cut opalescent blue sapphire that glows like light on water. Two coordinating rings, a bright rhodium finish, and a geometric, dark-romantic silhouette designed to be worn together as a promise.
Natural black onyx
Opalescent blue sapphire
Kite cut
Two-piece ring set
Rhodium finish
Free velvet gift box
A geometric, dark-romantic set
Clean kite lines give this set a modern, architectural feel, while jet-black onyx accents wrap the luminous sapphire in shadow. Worn as a pair, the rings frame the blue center from both sides, so its opalescent glow floats against a field of black. It is a design made for anyone drawn to the moody, non-traditional look of our kite cut black onyx engagement rings and the wider black onyx engagement rings collection.
The engagement ring
Holds the kite-cut opalescent blue sapphire accented with jet-black onyx — the statement piece and focal point of the set.
The matching band
A slender coordinating band that nests alongside the main ring, completing the geometric silhouette. Lovely stacked or solo, and a match for our gothic couple rings.
The natural black onyx
Black onyx is a natural chalcedony, a form of quartz cherished for its solid, even color and glassy polish. Here it appears as pure, saturated jet-black with a soft luminous sheen — the ideal dark frame to make the blue sapphire look brighter and more electric. Sitting around 6.5 to 7 on the Mohs hardness scale, it wears comfortably every day. For the meaning and lore behind the stone, our guide to black onyx meaning is a rich place to begin, and our overview of black gemstones puts it in wider context.
A kite-cut opalescent blue sapphire center
At the heart of the set sits a simulated blue sapphire cut into a crisp kite, glowing with a soft opalescent sheen that shifts between azure and cerulean like light on deep water. It is a vivid, budget-friendly way to bring cool color and movement to a dark, dramatic design, and against the flat black of the onyx that blue truly comes alive.
Solid sterling silver with a rhodium finish
Both rings are crafted in solid 925 sterling silver and finished with rhodium, the same precious metal used on fine white-gold jewelry. That rhodium layer gives each band a bright, mirror-white luster and adds protection that helps resist tarnish and everyday scratches, keeping the silver looking freshly polished. It also means your set will not tarnish easily or leave marks on your skin. It is the detail that lets a sterling silver set wear like something far more expensive.
What black onyx symbolizes
Black onyx has long been a stone of strength, protection and grounded resolve, while blue tones have always spoken of loyalty and calm. Together they make a fitting emblem for a partnership that is both steady and serene — a quiet promise of devotion. To see how dark stones fit into a longer romantic tradition, explore our feature on Victorian gothic engagement rings.
Specifications
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Metal Solid 925 sterling silver with rhodium finish
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Center stone Simulated opalescent blue sapphire, kite cut
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Accent stones Natural black onyx
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Center size Approx. 5.0 x 8.0 mm, about 1.4 ct
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Band width Approx. 1.6 mm (each ring)
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Onyx hardness Around 6.5–7 on the Mohs scale
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Set includes Two coordinating rings
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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. Because black onyx is a natural stone, avoid harsh chemicals and ultrasonic cleaners; remove the rings before showering, swimming or applying lotions, and store them in the velvet box when not worn. A soft, dry cloth restores the onyx polish and rhodium shine. Please note the book box shown is for styling only; your set arrives in a luxurious velvet ring box.
Frequently asked questions
Is the black onyx natural?
Yes. The accent stones are natural black onyx, a natural chalcedony prized for its even, glossy jet-black color, hand-set in solid 925 sterling silver.
Does this come as a set?
Yes. It is sold as a two-piece set: the kite-cut sapphire engagement ring plus a matching band designed to nest alongside it. The band can also be worn on its own.
Is the blue sapphire a natural stone?
The center is a simulated blue sapphire, chosen for its bright, consistent opalescent glow. It delivers vivid color and movement at a friendly price.
What makes this a black onyx ring set?
The jet-black natural onyx accents frame the design and set its dark, glossy tone across both rings, while the opalescent sapphire provides a luminous blue center.
What metal is the set made from?
Solid 925 sterling silver, finished with rhodium for a bright white luster and added 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 keeps both rings looking freshly polished.
Is black onyx durable enough for daily wear?
Black onyx sits around 6.5 to 7 on the Mohs scale, making it well suited to everyday wear with normal care. Avoid hard knocks and remove the rings for rough activities to keep the polish pristine.
Can this be an engagement set?
Absolutely. It is designed as a bold, non-traditional engagement or promise set, and its dark-romantic character makes it a striking alternative to a classic solitaire pairing.
Will sterling silver turn my finger green?
No. Because it is genuine 925 sterling silver with a rhodium finish, it will not tarnish easily or leave marks on your skin. Green marks come from low-quality metals, not real sterling silver.
Can the rings be engraved?
Yes. You can add a personal engraving of up to 16 characters at checkout, such as a date, initials or a short message. Engraved pieces are final sale, so please double-check spelling.
How should I care for the set?
Remove both rings before showering, swimming or applying lotions, avoid harsh chemicals and ultrasonic cleaners, store them in the velvet box, and buff gently with a soft dry cloth to restore shine.
Are the stones ethically sourced?
Yes. All of our stones are ethically sourced and conflict-free, so you can wear the 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.
