{"product_id":"10-36ct-etw-earth-mined-greenish-blue-grandidierite-pentagon-cut-large-stone","title":"10.36ct ETW Earth-Mined Greenish Blue Grandidierite – Pentagon Cut, Large Stone","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e10.36ct ETW Earth-Mined Greenish Blue Grandidierite – Pentagon Cut, Large Stone\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis impressive loose gemstone features an earth-mined greenish blue grandidierite from Madagascar, showcasing distinctive blue-green coloration in an unusual pentagon cut. Its substantial 10.36-carat weight, opaque clarity, and generous dimensions create a striking presentation for custom statement jewelry or gemstone collecting.\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 10.36ct ETW\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eCut:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Pentagon Cut\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eDimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 15.7 x 15.2 x 8.2 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\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 10.36ct ETW in a distinctive pentagon cut from Madagascar, featuring opaque clarity and impressive dimensions.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis grandidierite displays an appealing combination of green and blue tones, creating a distinctive appearance that sets it apart from more familiar colored gemstones. Its opaque character emphasizes the gemstone's body color rather than internal transparency, while its unusual pentagonal outline provides an eye-catching geometric presentation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGrandidierite is a rare magnesium-aluminum borosilicate mineral first discovered in Madagascar in 1902. It was named in honor of French naturalist and explorer Alfred Grandidier, who conducted extensive studies of Madagascar's natural history. The mineral is particularly admired for its distinctive blue-green coloration, which is primarily associated with iron within its crystal structure.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAlthough grandidierite is considered a rare mineral, its gemological value varies considerably according to transparency, color, size, and overall quality. Transparent, facetable specimens are exceptionally uncommon, while opaque material offers a different collectible appeal through its distinctive coloration and mineral identity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAt 10.36 carats with dimensions of 15.7 x 15.2 x 8.2 mm, this gemstone offers substantial visual presence. Its bold pentagon shape makes it particularly well suited for a custom statement pendant, where its unusual geometry and greenish blue coloration can be prominently displayed. It also makes an interesting addition to a collection of uncommon gemstone species.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMadagascar holds a special place in the history of grandidierite as the location of its original discovery. The island is recognized for its remarkable mineral diversity and remains an important source of this unusual gemstone species. With a hardness of approximately 7 to 7.5 on the Mohs scale, grandidierite offers reasonable scratch resistance when handled with care.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAn impressive earth-mined greenish blue grandidierite from Madagascar, offering unusual pentagonal styling, substantial size, and the distinctive character of a rare gemstone species.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e(Stock Code: EDMM)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKeywords: loose gemstone, earth-mined grandidierite, greenish blue grandidierite, blue green grandidierite, Madagascar grandidierite, Madagascan gemstone, rare gemstone, pentagon cut gemstone, opaque grandidierite, large grandidierite, natural grandidierite, collector gemstone, 10.36ct grandidierite, statement pendant gemstone\u003c\/span\u003e\u003c\/p\u003e","brand":"West Coast Gemstones","offers":[{"title":"Default Title","offer_id":67819499127065,"sku":null,"price":333.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/9196\/9305\/files\/10.36ctETWEarth-MinedGreenishBlueGrandidierite_PentagonCut_LargeStone.jpg?v=1792112735","url":"https:\/\/westcoastgemstones.com\/products\/10-36ct-etw-earth-mined-greenish-blue-grandidierite-pentagon-cut-large-stone","provider":"West Coast","version":"1.0","type":"link"}