{"product_id":"12-86ct-etw-earth-mined-greenish-blue-grandidierite-oval-cut-rare-gemstone","title":"12.86ct ETW Earth-Mined Greenish Blue Grandidierite – Oval Cut, Rare Gemstone","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e12.86ct ETW Earth-Mined Greenish Blue Grandidierite – Oval Cut, Rare Gemstone\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis impressive 12.86-carat earth-mined grandidierite from Madagascar features distinctive greenish blue coloration and an elegant oval cut. Its substantial size, rare mineral identity, and unique natural appearance make it an interesting addition to a gemstone collection or custom jewelry design.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSpecifications:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eGemstone:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Greenish Blue Grandidierite\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eCarat Weight:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 12.86ct ETW\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eCut:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Oval Cut\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eDimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 16.2 x 12.5 x 10.0 mm\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eClarity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Opaque\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eTreatment:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Unheated\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eOrigin:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Madagascar\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eCondition:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e New\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eEarth-mined greenish blue grandidierite weighing 12.86ct ETW in an oval cut from Madagascar, featuring opaque clarity and unheated character.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGrandidierite is a rare magnesium aluminum borosilicate mineral prized for its distinctive blue-green coloration and limited availability. Its unusual mineral composition and geological rarity make it particularly interesting to gemstone enthusiasts and mineral collectors.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis specimen displays attractive greenish blue tones in a classic oval shape. Its opaque clarity emphasizes the gemstone's natural color and distinctive internal patterns rather than transparent brilliance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMadagascar is the world's most recognized source of gem-quality grandidierite, producing specimens that range from translucent to opaque. This gemstone is unheated, retaining its naturally occurring coloration without heat enhancement.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAt 12.86 carats and measuring 16.2 x 12.5 x 10.0 mm, this gemstone offers substantial visual presence. Its oval shape provides versatile proportions for a custom pendant, statement jewelry design, or collector's display.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGrandidierite has a Mohs hardness of approximately 7 to 7.5, offering reasonable durability for carefully designed jewelry. Protective settings and gentle handling are recommended.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis individual Madagascan grandidierite combines impressive size, distinctive greenish blue coloration, and the appeal of a rare earth-mined mineral.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e(Stock Code: ABMM)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKeywords: loose gemstone, earth-mined grandidierite, natural grandidierite, greenish blue grandidierite, Madagascar grandidierite, Madagascar gemstone, oval cut grandidierite, opaque grandidierite, unheated grandidierite, 12.86ct grandidierite, rare gemstone, collector gemstone, blue green gemstone, statement pendant gemstone, mineral specimen\u003c\/span\u003e\u003c\/p\u003e","brand":"West Coast Gemstones","offers":[{"title":"Default Title","offer_id":68598535455001,"sku":null,"price":449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/9196\/9305\/files\/12.86ctETWEarth-MinedGreenishBlueGrandidierite_OvalCut_RareGemstone.webp?v=1794259763","url":"https:\/\/westcoastgemstones.com\/products\/12-86ct-etw-earth-mined-greenish-blue-grandidierite-oval-cut-rare-gemstone","provider":"West Coast","version":"1.0","type":"link"}