{"product_id":"crushed-black-fire-opal-wedding-band-in-rose-gold-tungsten-carbide-4mm","title":"Crushed Black Fire Opal Wedding Band in Rose Gold Tungsten Carbide (4mm)","description":"\u003cstyle\u003e\n.product-rich-content { font-family: inherit; color: #2a2a2a; line-height: 1.65; max-width: 720px; margin: 0 auto; }\n.product-rich-content h2 { font-size: 1.35em; font-weight: 600; color: #1a1a1a; margin-top: 2em; margin-bottom: 0.5em; padding-bottom: 0.4em; border-bottom: 1px solid #dcdde6; letter-spacing: -0.01em; }\n.product-rich-content h2:first-child { margin-top: 0; }\n.product-rich-content p { margin: 0.8em 0; }\n.product-rich-content ul { padding-left: 1.4em; margin: 0.8em 0; }\n.product-rich-content li { margin-bottom: 0.4em; }\n.product-rich-content .lead-paragraph { font-size: 1.05em; color: #1a1a1a; padding: 1em 1.2em; background: #f4f5f9; border-left: 3px solid #3a3f5c; border-radius: 4px; margin-bottom: 1.5em; }\n.product-rich-content .feature-pills { display: flex; flex-wrap: wrap; gap: 0.5em; margin: 1.2em 0; }\n.product-rich-content .feature-pills .pill { background: #f4f5f9; color: #3a3f5c; padding: 0.4em 0.9em; border-radius: 100px; font-size: 0.88em; font-weight: 500; border: 1px solid #dcdde6; }\n.product-rich-content .spec-card { background: #fafafa; border: 1px solid #ececec; border-radius: 6px; padding: 1.2em 1.5em; margin: 1em 0; }\n.product-rich-content .spec-card ul { margin: 0; }\n.product-rich-content .spec-card li { list-style: none; padding: 0.35em 0; border-bottom: 1px dashed #e8e8e8; }\n.product-rich-content .spec-card li:last-child { border-bottom: none; }\n.product-rich-content .spec-card strong { display: inline-block; min-width: 140px; color: #1a1a1a; }\n.product-rich-content .product-faq { margin-top: 2.5em; }\n.product-rich-content .product-faq h2 { margin-bottom: 1em; }\n.product-rich-content .faq-item { border: 1px solid #e8e8e8; border-radius: 6px; margin-bottom: 0.6em; background: #fff; transition: border-color 0.2s ease; }\n.product-rich-content .faq-item:hover { border-color: #3a3f5c; }\n.product-rich-content .faq-item summary { cursor: pointer; padding: 0.9em 1.1em; font-weight: 500; list-style: none; color: #1a1a1a; position: relative; padding-right: 2.5em; }\n.product-rich-content .faq-item summary::-webkit-details-marker { display: none; }\n.product-rich-content .faq-item summary::after { content: \"+\"; position: absolute; right: 1.1em; top: 50%; transform: translateY(-50%); font-size: 1.3em; color: #3a3f5c; font-weight: 300; transition: transform 0.2s ease; }\n.product-rich-content .faq-item[open] summary::after { content: \"−\"; }\n.product-rich-content .faq-item[open] summary { border-bottom: 1px solid #dcdde6; }\n.product-rich-content .faq-item p { padding: 0 1.2em 1em; margin: 0.6em 0 0; color: #4a4a4a; }\n@media (max-width: 600px) { .product-rich-content .spec-card strong { display: block; min-width: auto; margin-bottom: 0.2em; } }\n\u003c\/style\u003e\n\u003cdiv class=\"product-rich-content\"\u003e\n\u003cp class=\"lead-paragraph\"\u003eThis 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.\u003c\/p\u003e\n\u003cdiv class=\"feature-pills\"\u003e\n\u003cspan class=\"pill\"\u003eCrushed black fire opal\u003c\/span\u003e\n\u003cspan class=\"pill\"\u003eRose gold tone tungsten\u003c\/span\u003e\n\u003cspan class=\"pill\"\u003eSlim 4mm unisex width\u003c\/span\u003e\n\u003cspan class=\"pill\"\u003eComfort fit\u003c\/span\u003e\n\u003cspan class=\"pill\"\u003eScratch-resistant\u003c\/span\u003e\n\u003cspan class=\"pill\"\u003eOne-of-a-kind inlay\u003c\/span\u003e\n\u003c\/div\u003e\n\u003ch2\u003eThe inlay: black fire opal\u003c\/h2\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003ch2\u003eRose gold tone tungsten, slim 4mm\u003c\/h2\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003ch2\u003eBuilt for daily wear\u003c\/h2\u003e\n\u003cp\u003eTungsten 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.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e 4mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior\u003c\/strong\u003e Rose gold tone tungsten carbide (not solid gold)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlay\u003c\/strong\u003e Crushed black fire opal, sealed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit\u003c\/strong\u003e Comfort fit interior — unisex\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHypoallergenic\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes\u003c\/strong\u003e Free luxury velvet jewelry box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping\u003c\/strong\u003e Free USA shipping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhy partners choose this ring\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eA unisex band pairing mysterious dark opal with warm, romantic rose gold\u003c\/li\u003e\n\u003cli\u003eThe subtlest profile for this stone — slim, lightweight, stackable\u003c\/li\u003e\n\u003cli\u003eA meaningful, one-of-a-kind wedding, promise, or anniversary ring\u003c\/li\u003e\n\u003cli\u003eA daily-wear band — see our guide to non-traditional men's wedding bands for how opal inlays compare\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSizing \u0026amp; care\u003c\/h2\u003e\n\u003cp\u003eThis 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.\u003c\/p\u003e\n\u003cp\u003eLove this look? Explore the full tungsten rings collection, or see all men's rings.\u003c\/p\u003e\n\u003cdiv class=\"product-faq\"\u003e\n\u003ch2\u003eBlack fire opal 4mm band FAQs\u003c\/h2\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eWhat is the dark stone?\u003c\/summary\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eIs this ring solid rose gold?\u003c\/summary\u003e\u003cp\u003eNo. 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.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eIs this a men's or women's ring?\u003c\/summary\u003e\u003cp\u003eBoth — 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.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eDo you offer this stone in a wider band?\u003c\/summary\u003e\u003cp\u003eYes — black fire opal is also available in a bolder 8mm two-tone rose gold and black hammered band elsewhere in our tungsten collection.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eWill every ring look the same?\u003c\/summary\u003e\u003cp\u003eNo 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.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eIs tungsten carbide scratch-resistant?\u003c\/summary\u003e\u003cp\u003eYes — 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.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eWill tungsten turn my finger green?\u003c\/summary\u003e\u003cp\u003eNo. 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.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eIs 4mm a good width?\u003c\/summary\u003e\u003cp\u003e4mm is a slim, understated width — lightweight and comfortable, ideal for smaller hands, stacking, or anyone who prefers a subtle band.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eHow do I find the right ring size?\u003c\/summary\u003e\u003cp\u003eWe 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.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eCan I wear it in water?\u003c\/summary\u003e\u003cp\u003eEveryday 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.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eDoes this come with a gift box and free shipping?\u003c\/summary\u003e\u003cp\u003eYes — every Aquamarise ring arrives in a free luxury velvet jewelry box, and this band ships free within the USA.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n\"@context\": \"https:\/\/schema.org\",\n\"@type\": \"FAQPage\",\n\"mainEntity\": [\n{\"@type\": \"Question\", \"name\": \"What is the dark stone?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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.\"}},\n{\"@type\": \"Question\", \"name\": \"Is this ring solid rose gold?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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. 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Skin discoloration comes from low-quality or plated metals — never from genuine tungsten carbide.\"}},\n{\"@type\": \"Question\", \"name\": \"Is 4mm a good width?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"4mm is a slim, understated width — lightweight and comfortable, ideal for smaller hands, stacking, or anyone who prefers a subtle band.\"}},\n{\"@type\": \"Question\", \"name\": \"How do I find the right ring size?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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.\"}},\n{\"@type\": \"Question\", \"name\": \"Can I wear it in water?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Everyday water and hand-washing are fine thanks to the sealed inlay. 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