This crushed black fire opal wedding band sets a dark, iridescent black fire opal inlay — flashing deep, shifting color like the night sky — into a warm rose gold tone tungsten carbide band in a slim, unisex 4mm width. Mysterious dark opal against romantic rose gold, in the subtlest profile we offer this stone. Because each inlay is hand-set, no two rings are alike. Ships with a free luxury velvet jewelry box and free USA shipping.
Crushed black fire opal
Rose gold tone tungsten
Slim 4mm unisex width
Comfort fit
Scratch-resistant
One-of-a-kind inlay
The inlay: black fire opal
The center channel is hand-set with crushed black fire opal — dark and mysterious, with deep flashes of iridescent color that shift as the ring moves, like glimpses of the night sky. Against the warm rose gold band, the dark opal reads romantic rather than gothic — an unusual, striking pairing. The inlay is sealed under a protective coating, and no two rings match. Drawn to the stone? Our fire opal engagement rings guide explores its color and character.
Rose gold tone tungsten, slim 4mm
The band is tungsten carbide in a warm rose gold tone, in a slim, lightweight 4mm unisex width — the most delicate way to wear this stone, ideal for smaller hands, stacking, or anyone who prefers a subtler band. The rose gold tone is bonded into the tungsten itself, not solid gold and not plated, so it won't chip, fade, or wear away; for solid gold, see our men's gold rings. Prefer a bolder look? We also offer black fire opal on a wider two-tone rose gold and black band.
Built for daily wear
Tungsten carbide is one of the hardest metals used in jewelry — about four times harder than titanium, five times harder than steel, and ten times harder than gold. It won't bend, scratch from keys or tools, or lose its shape, and it's naturally hypoallergenic. Curious how it holds up? Read do tungsten rings scratch? and titanium vs tungsten rings.
Specifications
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Width 4mm
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Exterior Rose gold tone tungsten carbide (not solid gold)
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Inlay Crushed black fire opal, sealed
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Fit Comfort fit interior — unisex
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Hypoallergenic Yes
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Includes Free luxury velvet jewelry box
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Shipping Free USA shipping
Why partners choose this ring
- A unisex band pairing mysterious dark opal with warm, romantic rose gold
- The subtlest profile for this stone — slim, lightweight, stackable
- A meaningful, one-of-a-kind wedding, promise, or anniversary ring
- A daily-wear band — see our guide to non-traditional men's wedding bands for how opal inlays compare
Sizing & care
This band runs true to size — we recommend confirming your ring size before ordering; a local jeweler can measure you in minutes. Choosing between widths? Our men's wedding band width guide breaks it down, and for everything about tungsten sizing and fit, see can tungsten rings be resized or cut off? The sealed inlay handles everyday water and hand-washing; rinse and dry with a soft cloth, and remove it around harsh chemicals like chlorine.
Love this look? Explore the full tungsten rings collection, or see all men's rings.
Black fire opal 4mm band FAQs
What is the dark stone?
The centerpiece is a crushed black fire opal inlay, dark and mysterious with deep flashes of iridescent color. Each inlay is hand-set, so every ring is one of a kind. Our fire opal engagement rings guide covers the stone in more detail.
Is this ring solid rose gold?
No. The band is a durable rose gold tone bonded into tungsten carbide, not solid gold and not plating, so it won't tarnish or wear off. If you'd like solid gold, see our men's gold rings.
Is this a men's or women's ring?
Both — the slim 4mm width is designed as a unisex band, equally at home as a men's or women's wedding band, a promise ring, or a stacking ring.
Do you offer this stone in a wider band?
Yes — black fire opal is also available in a bolder 8mm two-tone rose gold and black hammered band elsewhere in our tungsten collection.
Will every ring look the same?
No two are identical. Each fire opal inlay is hand-set, so yours will share the same character as our photos with its own one-of-a-kind pattern.
Is tungsten carbide scratch-resistant?
Yes — tungsten carbide is one of the hardest metals used in jewelry and is significantly more scratch-resistant than gold, silver, or titanium, making it ideal for everyday wear.
Will tungsten turn my finger green?
No. Tungsten carbide is hypoallergenic and won't react with skin, sweat, or lotions. Skin discoloration comes from low-quality or plated metals — never from genuine tungsten carbide.
Is 4mm a good width?
4mm is a slim, understated width — lightweight and comfortable, ideal for smaller hands, stacking, or anyone who prefers a subtle band.
How do I find the right ring size?
We recommend getting professionally sized at a local jeweler before ordering — it takes just a few minutes, and our team is happy to help you find your correct size.
Can I wear it in water?
Everyday water and hand-washing are fine thanks to the sealed inlay. We recommend removing it for chlorinated pools and harsh chemicals to keep the opal vivid.
Does this come with a gift box and free shipping?
Yes — every Aquamarise ring arrives in a free luxury velvet jewelry box, and this band ships free within the USA.