{"title":"Spinelles – Pierres naturelles sur papier","description":"\u003cp\u003eLe spinelle est l'une des pierres les plus discrètement remarquables du commerce : un oxyde de magnésium et d'aluminium (MgAl2O4) d'une dureté de 8 sur l'échelle de Mohs, assez résistant pour les bijoux du quotidien, et dont la palette rivalise avec celle du saphir et du rubis — gris-bleu froids, rouges vifs, roses éclatants, violets et rares bleus cobalt. Pendant des siècles, le spinelle a été confondu avec le rubis et le saphir : plusieurs «\u0026nbsp;rubis\u0026nbsp;» célèbres des joyaux de la Couronne, dont le Rubis du Prince Noir de la Couronne impériale d'apparat britannique, se sont révélés plus tard être des spinelles. Il se forme naturellement aux côtés du corindon, dans les mêmes gisements de marbre et de roches métamorphiques, notamment au Sri Lanka et en Afrique de l'Est.\u003c\/p\u003e\n\u003cp\u003eContrairement au saphir et au rubis, le spinelle est beaucoup moins souvent traité : il n'existe pas de tradition de chauffage systématique comme pour le corindon, et le SSEF décrit le spinelle comme rarement traité. C'est une forte tendance, pas une règle. Le GIA indique que certains spinelles font l'objet d'un chauffage destiné à modifier leur couleur et que le spinelle fait parfois l'objet d'un remplissage des fissures ; le spinelle bleu diffusé au cobalt circule en quantité depuis 2015, et la recherche de la diffusion au cobalt fait désormais partie du service standard du GIA. Le bleu est précisément la couleur visée par la diffusion : un spinelle bleu s'achète donc sur la base du statut de traitement indiqué pour la pierre, et non sur la réputation de l'espèce — c'est pourquoi chaque pierre est présentée ici avec le sien. Son indice de réfraction élevé lui donne un très bel éclat, et sa structure cristalline monoréfringente (isotrope) donne une couleur nette et constante sous tous les angles, sans l'effet de dédoublement que l'on observe sur certaines autres pierres.\u003c\/p\u003e\n\u003cp\u003eChaque spinelle de Crescent Gems est naturel, extrait de la terre, et vendu avec son statut de traitement indiqué sur la fiche. Il s'agit d'une catégorie plus restreinte et spécialisée de notre catalogue, et la disponibilité est limitée : chaque pierre est choisie pour sa rareté réelle et la qualité de sa couleur, pas pour le 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 carat bluish-gray spinel in a radiant cut, documented on AGCL Report #M263110. The cool, sophisticated bluish-gray tone is a distinctive alternative to traditional blue gemstones, and spinel's naturally high brilliance produces strong light return without any enhancement. Spinel ranks 8 on the Mohs scale, making it one of the more durable gem species for fine jewelry.\u003c\/p\u003e\n\n\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=\"\/fr\/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\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eRarity Analysis\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eFine bluish-gray spinel in this size and cutting quality represents a small slice of overall spinel production, most of which trends toward red, pink, and violet-blue hues rather than this cooler gray-blue tone.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Bluish-gray is a less commonly seen body color for spinel; most commercial material leans toward red, hot pink, or a warmer violet-blue rather than this cool, muted tone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e At 2.65 ct, this stone is comfortably above the sub-1.5 ct sizes most commonly available for spinel in fine color.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment:\u003c\/strong\u003e Spinel as a species is rarely treated in the market to begin with — but on this specific stone, the AGCL report's Comments field is blank and does not address treatment at all. \"Unheated\" here reflects the store's own assessment, not an independently lab-confirmed determination, and we want buyers to know that distinction plainly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCut:\u003c\/strong\u003e The octagonal, step-cut outline (labeled by AGCL as an Emerald Cut, cut in-house to Radiant Cut proportions) requires precise faceting to return light evenly across a cooler body color — a more exacting cut than a simple round or oval.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocumentation:\u003c\/strong\u003e An independent AGCL report confirms this stone's weight, dimensions, and clarity — a level of third-party documentation many loose colored stones in this size range don't carry at all.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombined effect:\u003c\/strong\u003e It is the pairing of an uncommon cool body color, above-average size, exacting step-cut faceting, and independent documentation — not any single factor — that makes a stone like this difficult to replace once sold.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eBuying Guidance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eA few practical points to weigh before purchasing this specific stone:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eView it in more than one light.\u003c\/strong\u003e The step-cut facets of an emerald\/radiant-style cut show color and any minor inclusions more openly than a brilliant cut, so compare the stone in daylight and indoor light before deciding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlan the setting around the outline.\u003c\/strong\u003e At 9.22 x 6.33 x 5.30 mm, this is an elongated octagonal stone — four-prong or east-west settings that follow the step-cut corners will show off the faceting better than a setting designed for a round or oval stone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAsk about additional documentation if you want independent treatment verification.\u003c\/strong\u003e The AGCL report is silent on treatment for this stone — if lab-confirmed treatment status matters to you, ask us about arranging supplementary documentation before purchase.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeigh the value case.\u003c\/strong\u003e Spinel in this color and size remains comparatively undervalued next to sapphire of similar quality, which is part of what makes the rarity factors above meaningful for long-term value.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse the Try Before You Buy option\u003c\/strong\u003e if you would like to see the stone in hand before finalizing the purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eLearn More About This Gemstone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/fr\/blogs\/information-pages-complete-guide\/spinel-buyers-guide\"\u003eSpinel Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/fr\/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=\"\/fr\/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=\"\/fr\/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=\"\/fr\/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\n\n\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: 14px; color: #4a235a;\"\u003eGemstone Data — At a Glance\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600; width: 42%;\"\u003eItem #\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eCG8403\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eCarat Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003e2.65 ct\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eSpecies \/ Variety\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eNatural Spinel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eShape \/ Cut\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eEmerald Cut (Octagonal outline per AGCL report); Radiant Cut faceting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003e9.22 x 6.33 x 5.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eColor \/ Intensity\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eBluish Gray\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003ePhenomenon\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eTreatment\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eUnheated — store's own assessment; the AGCL report's Comments field is blank and does not address treatment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eOrigin\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eSri Lanka (Ceylon) — store's own assessment; not addressed by the AGCL report\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eClarity\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eVery Slightly Included — minor inclusions may be visible under magnification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eTransparency\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eTransparent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eHardness\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003e8 (Mohs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; font-weight: 600;\"\u003eCertification\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px;\"\u003eAGCL Report #M263110\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eSKU: CG8403\u003c\/li\u003e\n\u003cli\u003eVariety: Spinel\u003c\/li\u003e\n\u003cli\u003eWeight: 2.65 Carats\u003c\/li\u003e\n\u003cli\u003eDimensions: 9.22 x 6.33 x 5.30 mm\u003c\/li\u003e\n\u003cli\u003eShape: Emerald Cut (Octagonal outline per AGCL report)\u003c\/li\u003e\n\u003cli\u003eCut Style: Radiant Cut\u003c\/li\u003e\n\u003cli\u003eOrigin: Sri Lanka (Ceylon) (store's own assessment; not addressed by the AGCL report)\u003c\/li\u003e\n\u003cli\u003eTreatment: Unheated (store's own assessment; the AGCL report's Comments field is blank and does not address treatment)\u003c\/li\u003e\n\u003cli\u003eColor: Bluish Gray\u003c\/li\u003e\n\u003cli\u003eClarity: Very Slightly Included — minor inclusions may be visible under magnification\u003c\/li\u003e\n\u003cli\u003eTransparency: Transparent\u003c\/li\u003e\n\u003cli\u003eCertification: AGCL (Arctic Gem Certification \u0026amp; Laboratory), Report #M263110\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis 2.65 ct bluish-gray spinel has been hand-selected for the evenness of its cool tone and the precision of its radiant faceting — a refined, versatile choice for statement jewelry.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eOne of a Kind\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eThis is a single natural gemstone, not a lab-created or mass-produced stone. No two natural spinels are identical — the exact stone pictured is the exact stone you receive.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eCare\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eClean with lukewarm water and mild soap using a soft brush; avoid ultrasonic or steam cleaners. Store separately from other jewelry and remove before heavy physical activity.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eAGCL Gemstone Report #M263110\u003c\/li\u003e\n\u003cli\u003eGemstone 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":true}],"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\/fr\/collections\/spinel-gemstones-natural-loose-stones.oembed","provider":"Crescent Gems","version":"1.0","type":"link"}