{"title":"Ilvaite","description":"\u003cp\u003e\u003cstrong\u003eIlvaite\u003c\/strong\u003e is a black, iron-rich calcium sorosilicate first described in 1811 on the island of \u003cstrong\u003eElba\u003c\/strong\u003e, Italy, from which its name derives (Latin \"Ilva\"). It typically forms elongated, striated prismatic crystals with a sub-metallic, almost tourmaline-like luster, along with columnar and granular masses. With a hardness of 5.5–6 and a specific gravity near 4, it is a dense, satisfying mineral to hold, and it is structurally related to \u003cstrong\u003elawsonite\u003c\/strong\u003e as part of the broader \u003cstrong\u003elawsonite group\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe type locality, \u003cstrong\u003eRio Marina\u003c\/strong\u003e and \u003cstrong\u003eCapo Calamita\u003c\/strong\u003e on Elba, remains classic for well-formed crystals to 2 cm in skarn contact with dolomite, often accompanied by \u003cstrong\u003epyrite\u003c\/strong\u003e, \u003cstrong\u003emagnetite\u003c\/strong\u003e, \u003cstrong\u003ehematite\u003c\/strong\u003e and \u003cstrong\u003egoethite\u003c\/strong\u003e. Exceptional, larger specimens come from \u003cstrong\u003eSeriphos\u003c\/strong\u003e in Greece, historically prized for crystals up to 10 cm, and from the \u003cstrong\u003eHuanggang Mine\u003c\/strong\u003e in Inner Mongolia, China, now the source of the finest and largest ilvaite crystals on the market. Other notable occurrences include \u003cstrong\u003eDal'negorsk\u003c\/strong\u003e in Russia, the \u003cstrong\u003eLaxey mine\u003c\/strong\u003e in Idaho, \u003cstrong\u003ePrince of Wales Island\u003c\/strong\u003e in Alaska, and the \u003cstrong\u003eIlímaussaq intrusion\u003c\/strong\u003e in Greenland.\u003c\/p\u003e\u003cp\u003eFormed through contact metamorphism and skarn mineralization, ilvaite is prized by collectors for its bold black crystal habit, its historic ties to Elba's classic mining districts, and its relative scarcity in fine, lustrous, well-terminated form compared to more common skarn minerals.\u003c\/p\u003e","products":[{"product_id":"ilvaite-crossed-terminated-jet-black-crystals-from-inner-mongolia-china","title":"ILVAITE – Crossed \u0026 Terminated Jet-Black Crystals from Inner Mongolia, China","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eNatural Ilvaite from Inner Mongolia, China, featuring two lustrous jet-black crystals naturally intersecting to form a dynamic, eye-catching arrangement. Sharp crystal faces and excellent termination make this a striking piece from one of the world's most productive modern ilvaite localities.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eMineral Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 48 × 23 × 26 mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 20 g\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eProvenance:\u003c\/strong\u003e Huanggang Fe-Sn Deposit, Hexigten Banner, Chifeng City, Inner Mongolia, China\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ITALMINERAL","offers":[{"title":"Default Title","offer_id":45443608248429,"sku":null,"price":69.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8027\/6333\/files\/IMG20260224162825.jpg?v=1783607288"}],"url":"https:\/\/www.italmineral.com\/collections\/ilvaite.oembed","provider":"ITALMINERAL","version":"1.0","type":"link"}