{"title":"Autunite","description":"\u003cp\u003e\u003cstrong\u003eAutunite\u003c\/strong\u003e is a hydrated calcium uranyl phosphate, Ca(UO2)2(PO4)2·10–12H2O, prized above all for its dazzling lemon to greenish-yellow tabular crystals and their vivid yellow-green fluorescence under both shortwave and longwave UV light. It typically forms as thin square or rectangular plates, often in fan-like sprays, foliated crusts, or serrated edge-on aggregates, with a soft hardness of 2–2.5 and a pearly to vitreous luster. As a secondary mineral, it forms in the oxidation zones of hydrothermal veins and granite pegmatites where primary uranium minerals such as \u003cstrong\u003euraninite\u003c\/strong\u003e have broken down, commonly alongside \u003cstrong\u003etorbernite\u003c\/strong\u003e, \u003cstrong\u003emeta-autunite\u003c\/strong\u003e, \u003cstrong\u003ephosphuranylite\u003c\/strong\u003e, \u003cstrong\u003esaléeite\u003c\/strong\u003e, \u003cstrong\u003euranophane\u003c\/strong\u003e, and \u003cstrong\u003esabugalite\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThe type locality is \u003cstrong\u003eSaint-Symphorien-de-Marmagne\u003c\/strong\u003e near \u003cstrong\u003eAutun\u003c\/strong\u003e, in Saône-et-Loire, France, where the species was first described in 1852; nearby French classics include the \u003cstrong\u003eMargnac mine\u003c\/strong\u003e in Haute-Vienne and the \u003cstrong\u003eGagnol mine\u003c\/strong\u003e at Lachaux. Exceptional specimens are also known from \u003cstrong\u003eBergen\u003c\/strong\u003e in Germany's Vogtland, from \u003cstrong\u003eSabugal\u003c\/strong\u003e and \u003cstrong\u003eUrgeiriça\u003c\/strong\u003e in Portugal, from numerous \u003cstrong\u003eCornwall\u003c\/strong\u003e workings in England, and from the \u003cstrong\u003eDaybreak Mine\u003c\/strong\u003e near \u003cstrong\u003eMount Spokane\u003c\/strong\u003e, Washington, one of the finest American localities. Because it readily dehydrates in air to meta-autunite, well-preserved, richly fluorescent crystal groups are genuinely scarce.\u003c\/p\u003e\u003cp\u003eCollectors seek autunite for its striking bright green glow, elegant tabular habit, and role as a classic uranium ore mineral with roughly 48% uranium content. Fine, undamaged plates and crusts from historic French, Portuguese, German, and American localities remain among the most desirable pieces in any fluorescent mineral or uranium mineral collection.\u003c\/p\u003e","products":[{"product_id":"lz-autunite-0","title":"URANIUM AUTUNITE – Yellow Crystal from Cuneo, Italy – Extremely Rare","description":"\u003cp data-start=\"384\" data-end=\"740\"\u003eRare Italian Autunite specimen from Montefallonio, Peveragno (Cuneo, Piedmont), a classic uranium-bearing locality. The specimen shows well-developed crystals with sharp faces and strong aesthetic quality, highly appreciated by advanced collectors. Excellent provenance and rarity make it a significant Italian uranium phosphate specimen.\u003cbr data-start=\"722\" data-end=\"725\"\u003e\u003c\/p\u003e\n\u003cp data-start=\"384\" data-end=\"740\"\u003e\u003cstrong\u003eMineral data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"741\" data-end=\"857\"\u003e\n\u003cli data-section-id=\"d8cig\" data-start=\"741\" data-end=\"772\"\u003e\n\u003cstrong\u003eDimensions: \u003c\/strong\u003e54 × 38 × 21 mm\u003c\/li\u003e\n\u003cli data-section-id=\"1vdtlsk\" data-start=\"773\" data-end=\"792\"\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 46.94 g\u003c\/li\u003e\n\u003cli data-section-id=\"ut0uvy\" data-start=\"793\" data-end=\"857\"\u003e\n\u003cstrong\u003eProvenance:\u003c\/strong\u003e Montefallonio, Peveragno, Cuneo, Piedmont, Italy\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ITALMINERAL","offers":[{"title":"Default Title","offer_id":44316672360557,"sku":null,"price":349.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8027\/6333\/files\/AGC_20240228_221902920.webp?v=1772305399"},{"product_id":"lz-uranium-autunite-france-0","title":"URANIUM AUTUNITE – Radioactive Green Crystals from France – Rare Specimen","description":"\u003cp\u003eRare natural Autunite specimen from La Faye, Grury, Burgundy-Franche-Comté, France. The piece displays well-formed green tabular crystals with sharp crystal faces and strong aesthetic quality. A classic uranium phosphate mineral highly valued by collectors for its crystal definition and natural habit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-start=\"602\" data-end=\"619\"\u003eMineral Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong data-start=\"620\" data-end=\"635\"\u003eDimensions:\u003c\/strong\u003e 71 × 50 × 33 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-start=\"652\" data-end=\"663\"\u003eWeight:\u003c\/strong\u003e 97.67 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-start=\"672\" data-end=\"687\"\u003eProvenance:\u003c\/strong\u003e La Faye, Grury, Burgundy-Franche-Comté, France\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ITALMINERAL","offers":[{"title":"Default Title","offer_id":44324172562541,"sku":null,"price":75.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8027\/6333\/files\/AGC_20240228_225822016.webp?v=1772573241"}],"url":"https:\/\/www.italmineral.com\/collections\/autunite.oembed","provider":"ITALMINERAL","version":"1.0","type":"link"}