{"product_id":"nerida-paraiba-blue-spinel-engagement-ring-black-ruthenium","title":"Nerida Lab-Grown Paraiba Blue Spinel Engagement Ring in Black Ruthenium","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 #cfe3e6; 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: #edf7f8; border-left: 3px solid #1f6f7a; 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: #edf7f8; color: #1f6f7a; padding: 0.4em 0.9em; border-radius: 100px; font-size: 0.88em; font-weight: 500; border: 1px solid #cfe3e6; }\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: #1f6f7a; }\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: #1f6f7a; 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 #cfe3e6; }\n.product-rich-content .faq-item p { padding: 0 1.2em 1em; margin: 0.6em 0 0; color: #4a4a4a; }\n@media (max-width: 600px) {\n.product-rich-content .spec-card strong { display: block; min-width: auto; margin-bottom: 0.2em; }\n}\n\u003c\/style\u003e\n\u003cdiv class=\"product-rich-content\"\u003e\n\u003cp class=\"lead-paragraph\"\u003eAn oval lab-grown spinel in neon Paraiba blue, 5.5 × 10 mm, set in a kite-shaped frame of engraved leaves. Small spinel accents mark the points of the frame and run down a split shank. Solid 925 sterling silver with a black ruthenium finish.\u003c\/p\u003e\n\u003cdiv class=\"feature-pills\"\u003e\n\u003cspan class=\"pill\"\u003eLab-Grown Spinel\u003c\/span\u003e\n\u003cspan class=\"pill\"\u003eParaiba Blue\u003c\/span\u003e\n\u003cspan class=\"pill\"\u003eOval Cut, 5.5 × 10 mm\u003c\/span\u003e\n\u003cspan class=\"pill\"\u003eEngraved Leaf Frame\u003c\/span\u003e\n\u003cspan class=\"pill\"\u003eBlack Ruthenium Finish\u003c\/span\u003e\n\u003cspan class=\"pill\"\u003eSizes 4–11\u003c\/span\u003e\n\u003c\/div\u003e\n\u003ch2\u003eThe Design\u003c\/h2\u003e\n\u003cp\u003eNerida is named for the sea nymphs of Greek myth, and the ring is built around water color. The oval sits north to south in four prongs inside a pointed, kite-shaped frame. Leaves are engraved into the black metal on every side of the stone, and the band splits in two as it reaches the frame, with a leaf and three small stones on each shoulder.\u003c\/p\u003e\n\u003cp\u003eIf you are looking past a plain solitaire, our guides to \u003ca href=\"https:\/\/aquamarise.com\/blogs\/journal\/fantasy-inspired-engagement-rings-for-couples-who-want-something-different\"\u003efantasy engagement rings\u003c\/a\u003e and \u003ca href=\"https:\/\/aquamarise.com\/blogs\/journal\/non-traditional-engagement-rings-a-complete-buyer-s-guide\"\u003enon-traditional engagement rings\u003c\/a\u003e map the wider field.\u003c\/p\u003e\n\u003ch2\u003eThe Paraiba Spinel\u003c\/h2\u003e\n\u003cp\u003eThe center stone is \u003cstrong\u003elab-grown spinel\u003c\/strong\u003e. Paraiba describes its color: the neon blue-green first seen in copper-bearing tourmaline from Paraíba, Brazil. This stone is not tourmaline. It is genuine spinel, grown in a laboratory, with the same chemistry and hardness as mined spinel.\u003c\/p\u003e\n\u003cp\u003eSpinel is 8 on the Mohs scale and has no cleavage, which makes it one of the tougher colored stones for a ring worn every day. It is also an August birthstone, covered in our \u003ca href=\"https:\/\/aquamarise.com\/blogs\/journal\/august-birthstone-complete-guide\"\u003eAugust birthstone guide\u003c\/a\u003e. For how it compares with other blue stones, see the \u003ca href=\"https:\/\/aquamarise.com\/blogs\/journal\/blue-gemstones-complete-guide\"\u003eblue gemstones guide\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eMetal and Stones\u003c\/h2\u003e\n\u003cp\u003eThe ring is solid 925 sterling silver with a \u003ca href=\"https:\/\/aquamarise.com\/blogs\/journal\/what-is-black-ruthenium\"\u003eblack ruthenium\u003c\/a\u003e finish, a platinum-group metal that settles to a deep gunmetal rather than a flat black. Against it the blue reads brighter than it would on silver. The small round accents are lab-grown spinel in the same color as the center.\u003c\/p\u003e\n\u003cp\u003ePart of our \u003ca href=\"https:\/\/aquamarise.com\/collections\/gothic-engagement-rings\"\u003egothic engagement rings\u003c\/a\u003e and \u003ca href=\"https:\/\/aquamarise.com\/collections\/blue-gemstone-jewelry\"\u003eblue gemstone jewelry\u003c\/a\u003e collections, alongside the rest of our \u003ca href=\"https:\/\/aquamarise.com\/collections\/black-ruthenium-jewelry\"\u003eblack ruthenium jewelry\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter stone:\u003c\/strong\u003e Lab-grown spinel, Paraiba blue, oval cut, 5.5 × 10 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccent stones:\u003c\/strong\u003e Lab-grown spinel rounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal:\u003c\/strong\u003e Solid 925 sterling silver, black ruthenium finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSetting:\u003c\/strong\u003e Four prongs in an engraved kite-shaped frame, split shank\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e Spinel, 8 on the Mohs scale\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes:\u003c\/strong\u003e 4 to 11, including half sizes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngraving:\u003c\/strong\u003e Available, up to 16 characters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePresentation:\u003c\/strong\u003e Free luxury velvet jewelry box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch2\u003eCare\u003c\/h2\u003e\n\u003cp\u003eSpinel is 8 on the Mohs scale and well suited to daily wear. Clean with warm water, mild soap and a soft brush. Avoid ultrasonic cleaners and household chemicals, which dull the ruthenium finish, and store the ring in its velvet box rather than loose.\u003c\/p\u003e\n\u003cdiv class=\"product-faq\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eIs this a Paraiba tourmaline?\u003c\/summary\u003e\u003cp\u003eNo. The stone is lab-grown spinel in the neon blue-green color known as Paraiba. It is genuine spinel, not tourmaline.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eIs lab-grown spinel a real gemstone?\u003c\/summary\u003e\u003cp\u003eYes. Lab-grown spinel has the same chemistry, hardness and optical behavior as mined spinel. It is grown in a laboratory instead of taken from the ground.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eWhat color is the stone?\u003c\/summary\u003e\u003cp\u003eA bright neon blue with a green cast, close to the color of a tropical lagoon. It reads bluer in daylight and slightly greener under warm indoor light.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eWhat are the small accent stones?\u003c\/summary\u003e\u003cp\u003eThey are lab-grown spinel in the same Paraiba blue as the center stone.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eIs spinel hard enough for an engagement ring?\u003c\/summary\u003e\u003cp\u003eYes. Spinel is 8 on the Mohs scale, harder than amethyst, garnet and quartz, and it suits daily wear.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eIs spinel a birthstone?\u003c\/summary\u003e\u003cp\u003eYes. Spinel is one of the August birthstones, alongside peridot and sardonyx.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eHow big is the center stone?\u003c\/summary\u003e\u003cp\u003e5.5 × 10 mm, oval cut, set north to south so the length runs along the finger.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eHow dark is the black ruthenium finish?\u003c\/summary\u003e\u003cp\u003eRuthenium settles to a deep gunmetal rather than a flat jet black. The slight reflectivity keeps the engraved leaves visible instead of flattening them.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eWhat is the ring made of?\u003c\/summary\u003e\u003cp\u003eSolid 925 sterling silver with a black ruthenium finish. No brass or base metal.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eWhat sizes are available?\u003c\/summary\u003e\u003cp\u003eSizes 4 through 11, including every half size.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eCan I have it engraved?\u003c\/summary\u003e\u003cp\u003eYes. Engraving is available on the inner band, up to 16 characters, and can be added as an option at checkout.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eDoes it come with a ring box?\u003c\/summary\u003e\u003cp\u003eYes. Every order arrives in a free luxury velvet jewelry box.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails class=\"faq-item\"\u003e\u003csummary\u003eAre the stones ethically sourced?\u003c\/summary\u003e\u003cp\u003eYes. The spinel is lab-grown, so no mining is involved, and all Aquamarise stones are conflict-free and responsibly sourced.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this a Paraiba tourmaline?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. The stone is lab-grown spinel in the neon blue-green color known as Paraiba. It is genuine spinel, not tourmaline.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is lab-grown spinel a real gemstone?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Lab-grown spinel has the same chemistry, hardness and optical behavior as mined spinel. It is grown in a laboratory instead of taken from the ground.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What color is the stone?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A bright neon blue with a green cast, close to the color of a tropical lagoon. 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No brass or base metal.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What sizes are available?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Sizes 4 through 11, including every half size.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I have it engraved?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Engraving is available on the inner band, up to 16 characters, and can be added as an option at checkout.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does it come with a ring box?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. 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