{"title":"Spinel Gemstones - Natural Loose Stones","description":"\u003cp\u003eSpinel is one of the most quietly remarkable gemstones in the trade — a magnesium aluminum oxide (MgAl2O4) that ranks 8 on the Mohs hardness scale, tough enough for everyday jewelry, and available in a color range that rivals sapphire and ruby: cool blue-grays, vivid reds, hot pinks, violets, and rare cobalt blues. For centuries spinel was mistaken for ruby and sapphire — several famous \"rubies\" in royal crown jewels, including the Black Prince's Ruby in the British Imperial State Crown, were later identified as spinel. It occurs naturally alongside corundum in the same marble and metamorphic deposits, particularly across Sri Lanka, Myanmar, and East Africa.\u003c\/p\u003e\n\u003cp\u003eUnlike sapphire and ruby, spinel is treated far less often — there is no routine heat-treatment tradition behind it the way there is in corundum, and SSEF describes spinel as not frequently treated. That is a strong tendency, not a rule. GIA records that some spinel is given colour-altering heat treatment and that spinel is occasionally fracture-filled, cobalt-diffused blue spinel has been traded in quantity since 2015, and checking spinel for cobalt diffusion is now part of GIA's standard service. Blue is precisely the colour that diffusion targets, so a blue spinel is worth buying on its stated treatment status rather than on the species' reputation — which is why every stone here is listed with its own. Its high refractive index gives it excellent brilliance, and its single-refractive (isotropic) crystal structure means color reads clean and consistent from every angle, without the doubling effect seen in some other gems.\u003c\/p\u003e\n\u003cp\u003eEvery spinel at Crescent Gems is natural, earth-mined, and sold with full treatment disclosure. As a smaller, specialist category in our catalog, availability is limited — each stone here is chosen for genuine rarity and color quality rather than volume.\u003c\/p\u003e","products":[{"product_id":"2-65-ct-blue-spinel","title":"2.65 ct Natural Unheated Bluish-Gray Spinel – Emerald Cut | AGCL Certified | Sri Lanka (Ceylon)","description":"\u003cp\u003eA natural 2.65 ct \u003cstrong\u003ebluish-grey spinel\u003c\/strong\u003e, radiant cut, \u003cstrong\u003eunheated\u003c\/strong\u003e, from \u003cstrong\u003eSri Lanka (Ceylon)\u003c\/strong\u003e, on \u003cstrong\u003eAGCL Report #M263110\u003c\/strong\u003e. A cool, sophisticated bluish-grey — spinel’s natural brilliance needs no enhancement, and at Mohs 8 it is among the more durable gem species for fine jewellery.\u003c\/p\u003e\u003cdiv style=\"border: 2px solid #5b2c6f; border-radius: 10px; padding: 20px 24px; margin: 28px 0; background-color: #f9f5fc;\"\u003e\n\u003ch2 style=\"margin-top: 0; margin-bottom: 12px; color: #4a235a;\"\u003eExpert Opinion\u003c\/h2\u003e\n\u003cp style=\"font-weight: 600; margin-bottom: 6px;\"\u003e\u003ca href=\"\/en-de\/pages\/ahmed-shareek-about-the-owner\" style=\"color: #4a235a; text-decoration: underline;\"\u003eAhmed Shareek\u003c\/a\u003e's Assessment\u003c\/p\u003e\n\u003cp style=\"font-style: italic; margin-bottom: 0;\"\u003e\"This bluish-gray spinel's cool, sophisticated tone is a genuine alternative to traditional blue gemstones, and its radiant faceting draws out a natural brilliance that needed no help from enhancement to get there.\"\u003c\/p\u003e\n\u003c\/div\u003e\u003ch2\u003eGood to Know\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatch the report to the stone:\u003c\/strong\u003e confirm report #M263110, its weight and measurements against the stone you receive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural spinel is untreated\u003c\/strong\u003e — a distinctive alternative to blue sapphire, with no enhancement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable for daily wear\u003c\/strong\u003e at Mohs 8.\u003c\/li\u003e\n\u003cli\u003eSee it first via \u003cstrong\u003eTry Before You Buy\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eLearn More About This Gemstone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/en-de\/blogs\/information-pages-complete-guide\/spinel-buyers-guide\"\u003eSpinel Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-de\/blogs\/information-pages-complete-guide\/sapphire-vs-spinel-collectors-guide\"\u003eSapphire vs. Spinel — The Overlooked Comparison\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-de\/blogs\/information-pages-complete-guide\/the-smart-way-to-buy-loose-gemstones-online-in-2026\"\u003eBuy Loose Gemstones the Smart Way in 2026\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-de\/blogs\/information-pages-complete-guide\/luxury-gemstones-at-fair-prices-direct-from-source\"\u003eWhy Crescent Gems Prices Loose Gemstones Below Retail\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-de\/blogs\/information-pages-complete-guide\/how-gems-are-formed-nature-s-incredible-underground-process\"\u003eHow Gemstones Are Formed\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCare \u0026amp; What’s Included\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eClean with warm water, mild soap and a soft brush; store separately; avoid ultrasonic and steam cleaners.\u003c\/li\u003e\n\u003cli\u003eShips with AGCL Report #M263110, packed in a gem sleeve.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Crescent Gems","offers":[{"title":"Default Title","offer_id":43032716279875,"sku":"CG8403","price":1590.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8982\/8931\/files\/1112023001_df92d7da-a9de-4911-9a7e-12fad49ddc55.jpg?v=1779989920"}],"url":"https:\/\/crescentgems.com\/en-de\/collections\/spinel-gemstones-natural-loose-stones.oembed","provider":"Crescent Gems","version":"1.0","type":"link"}