A 6 mm dome band carrying a bezel-set 3 × 5 mm oval lab-grown ruby between two black onyx pears, with carved leaf and scrollwork running out to each shoulder. Solid 925 sterling silver with a rhodium finish, polished, standard fit. Sizes 7 to 13.
Lab-Grown Ruby
Natural Black Onyx
Bezel-Set Oval, 3 × 5 mm
6 mm Dome Profile
Solid 925 Sterling Silver
Sizes 7–13
Four Ways to Wear It
Wedding Band
A 6 mm dome is the most-worn width in this range — substantial without being heavy, and low enough to sit under a glove or a watch cuff.
Engagement Ring
The bezel-set centre stone gives it a proper engagement-ring focal point, which most plain bands do not have.
Worn by Anyone
Nothing about the design is gendered. On a smaller hand the 6 mm reads bold rather than masculine, as a wide band or a solitaire alternative.
A 6 mm width is most often searched as a men's band, and that is where you will find this ring shelved in our collections — but it is genuinely unisex, and we would rather say so than pretend otherwise. If you are weighing widths, our wedding band width guide is the place to start, and how to choose a men's engagement ring covers the newer half of the question.
The Lab-Grown Ruby and Black Onyx
Ruby is corundum — the red variety — and corundum is a 9 on the Mohs scale, second only to diamond. On a ring worn every day, and especially on a hand that works, that hardness matters more than almost any other property. Our guide to what ruby means covers the history behind it.
This stone is lab-grown, with the same chemistry, hardness and optical behavior as mined corundum, in a saturated blood red. It is bezel-set — the metal wraps the girdle completely rather than gripping it with prongs. That is the right call on a band worn hard: nothing catches, nothing snags, and there are no prongs to wear down.
The two pears flanking it are natural black onyx, 2 × 4 mm — opaque, evenly black, and the reason the red reads as vivid as it does. Our black onyx guide covers the material.
Metal and Fit
Solid 925 sterling silver with a rhodium finish — the same platinum-group metal used on white gold. The rhodium gives the bright white surface and shields the silver underneath from tarnishing.
The profile is a dome: rounded on the outside, flat on the inside, in a standard fit. If you are used to comfort-fit bands, order your true size rather than sizing down — standard fit runs slightly snugger on the same number.
Part of our men's rings, women's wedding bands and gender-neutral rings collections, alongside the rest of our sterling silver rings. Ruby is the July birthstone — see our July birthstone guide. For the wider style, our guide to gothic rings for men and non-traditional wedding bands map the field.
Specifications
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Width: 6 mm
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Profile: Dome, standard fit, polished
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Center stone: Lab-grown ruby, oval cut, 3 × 5 mm, bezel-set
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Side stones: Natural black onyx pears, 2 × 4 mm
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Metal: Solid 925 sterling silver, rhodium finish
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Design: Carved leaf and vine with scrollwork shoulders
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Hardness: 9 on the Mohs scale (ruby)
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Sizes: 7 to 13, including half sizes
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Engraving: Available, up to 16 characters
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Presentation: Free luxury velvet jewelry box
Care
Ruby is 9 on the Mohs scale and among the most durable stones for daily wear; onyx is softer at 7 and prefers to avoid knocks. Clean with warm water, mild soap and a soft brush — our guide to cleaning sterling silver covers the method. Avoid abrasive polishes and chlorine, which wear the rhodium finish.
Frequently Asked Questions
Is this a men's ring or a women's ring?
Either. Nothing about the design is gendered. A 6 mm width is most commonly worn by men, which is why you will also find it in our men's collections, but it works equally as a women's wedding band or as an engagement ring for anyone.
Does it match the Carmilla rings?
Yes. It carries the same carved leaf-and-scroll work and the same lab-grown ruby and black onyx as the Carmilla bridal set, so the two sit together as a pair.
How wide is 6 mm on the hand?
It is a substantial everyday width without dominating the finger. On a smaller hand it reads as a bold wide band rather than a men's ring.
What does bezel-set mean, and why here?
The metal wraps around the whole girdle of the stone instead of holding it with prongs. On a band worn every day it means nothing snags on fabric and there are no prongs to wear thin or catch.
Is it standard fit or comfort fit?
Standard fit — flat on the inside. If you normally wear comfort-fit bands, order your true measured size rather than sizing down; standard fit runs a touch snugger at the same number.
Is the ruby real?
Yes. It is a genuine ruby — corundum — lab-grown rather than mined. Identical chemistry, hardness and color behavior. The difference is origin, not authenticity.
Is the black onyx natural?
Yes. The two pears flanking the center stone are natural black onyx.
Is ruby a birthstone?
Yes — ruby is the July birthstone.
What is it made of?
Solid 925 sterling silver throughout, hallmarked, with a rhodium finish for a bright white surface. No brass or base metal.
Will the silver tarnish?
The rhodium finish acts as a barrier, so it resists the darkening untreated sterling develops. The finish does wear thin after years of daily wear — we can refinish the band when it does.
Can it be resized or engraved?
Yes to both. Resizing starts from $45, and engraving is available on the inner band up to 16 characters, added as an option at checkout.
Are the stones ethically sourced?
Yes. All Aquamarise stones are conflict-free and responsibly sourced, and every order arrives in a free luxury velvet jewelry box.
