{"product_id":"willemite-with-mangano-calcite-uv-mineral-zambia","title":"Willemite with Mangano Calcite Fluorescent Mineral Specimen – Zambia","description":"\u003cp dir=\"auto\" class=\"PDq2pG_selectionAnchorContainer\"\u003eDiscover natural \u003cstrong\u003eWillemite with Mangano Calcite from Zambia\u003c\/strong\u003e, an unusual fluorescent mineral association displaying vivid green and orange fluorescence when viewed under ultraviolet light.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThese specimens have been observed responding under \u003cstrong\u003eShort Wave (SW), Medium Wave (MW) and Long Wave (LW) UV\u003c\/strong\u003e, with the most prominent fluorescent response occurring under \u003cstrong\u003eSW UV\u003c\/strong\u003e. Willemite is particularly renowned amongst fluorescent mineral collectors for its characteristic green fluorescence, while manganese-bearing calcite can produce contrasting orange to reddish-orange fluorescence.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eEvery specimen is naturally unique, with variations in shape, colour, mineral distribution, surface texture and fluorescent response. Each available piece has been individually photographed so you can select the \u003cstrong\u003eexact specimen you will receive\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eChoosing Your Specimen\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003eThere are \u003cstrong\u003e11 individually photographed specimens\u003c\/strong\u003e available, with each piece sold separately.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eSelect your preferred specimen from the variant menu to view its individual price and corresponding photographs.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eYou will receive the exact specimen selected from the variant menu and shown in the photographs.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eUV Fluorescence\u003c\/h2\u003e\n\u003cdiv dir=\"auto\" class=\"group TyagGW_tableContainer TyagGW_tableContainerWithTableOfContents\"\u003e\n\u003cdiv class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable dir=\"auto\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eUV Wavelength\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eObserved Response\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShort Wave (SW)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProminent green and orange fluorescence\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMedium Wave (MW)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFluorescent response observed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLong Wave (LW)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFluorescent response observed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp dir=\"auto\"\u003eFluorescence naturally varies between individual specimens. Colour and intensity can also differ according to UV wavelength, lamp output, ambient lighting and viewing conditions.\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eScientific Information\u003c\/h2\u003e\n\u003cdiv dir=\"auto\" class=\"group TyagGW_tableContainer TyagGW_tableContainerWithTableOfContents\"\u003e\n\u003cdiv class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable dir=\"auto\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eProperty\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eInformation\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrimary Mineral\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWillemite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAssociated Mineral\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eManganoan Calcite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWillemite Formula\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eZn₂SiO₄\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWillemite Mineral Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNesosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWillemite Crystal System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTrigonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWillemite Mohs Hardness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCalcite Formula\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCaCO₃\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCalcite Crystal System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTrigonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eZambia\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUV Reactive\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eObserved Wavelengths\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSW, MW and LW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eObserved Fluorescence\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen and orange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePredominant UV Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTreatment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNatural, untreated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecimen Selection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExact specimen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 dir=\"auto\"\u003eWhat Causes the Fluorescence?\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003eFluorescence occurs when certain minerals absorb ultraviolet radiation and emit part of that energy as visible light.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eWillemite is well known for producing \u003cstrong\u003egreen fluorescence\u003c\/strong\u003e, while manganese can act as an activator in calcite and produce contrasting orange to reddish fluorescence. The precise appearance and intensity depend on the mineral chemistry and distribution within each specimen as well as the UV wavelength used.\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eViewing Your UV Mineral\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003eFor the best fluorescent response, view the specimen in a \u003cstrong\u003edark environment with an appropriate mineral UV lamp\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eUsing different wavelengths can reveal changes in fluorescence colour, distribution and intensity. The appearance under SW, MW and LW UV may therefore differ considerably.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAlways follow the UV equipment manufacturer's safety instructions and avoid looking directly into a UV light source.\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eCare Instructions\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003eStore your specimen in a dry, stable environment and handle it carefully to protect its natural mineral surfaces. Remove loose dust with a soft, dry brush where appropriate and avoid harsh household cleaning products.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eStore separately from harder specimens where possible to reduce the risk of accidental scratching or damage.\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3 dir=\"auto\"\u003eIs Willemite with Mangano Calcite fluorescent?\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eYes. These specimens have displayed fluorescence under \u003cstrong\u003eSW, MW and LW ultraviolet light\u003c\/strong\u003e, although the intensity and appearance vary between individual pieces.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eWhat colour does Willemite with Mangano Calcite fluoresce?\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eGreen and orange fluorescence has been observed in this material. Willemite is associated with the green response, while manganese-bearing calcite can produce contrasting orange to reddish fluorescence.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eWhich UV wavelength produces the strongest response?\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe most prominent response observed in these specimens occurs under \u003cstrong\u003eShort Wave (SW) UV\u003c\/strong\u003e. Fluorescent responses have also been observed under MW and LW UV.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eWhere are these specimens from?\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThese Willemite with Mangano Calcite specimens originate from \u003cstrong\u003eZambia\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eWill I receive the exact specimen photographed?\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eYes. Choose your preferred variant and you will receive the \u003cstrong\u003eexact specimen shown in its corresponding photographs\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eWill every specimen fluoresce identically?\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eNo. These are natural mineral specimens, so mineral distribution and fluorescent intensity vary from piece to piece. UV wavelength, lamp intensity and viewing conditions can also affect the appearance.\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eLocation\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eZambia\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003ePlease Note\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003eEvery specimen is naturally unique, so variations in shape, colour, texture, mineral distribution and fluorescence are expected.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eFluorescent colours may appear differently in photographs than they do when viewed directly. UV response can also vary according to the lamp, wavelength, intensity and surrounding light conditions.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eYou will receive the exact specimen selected from the variant menu and shown in the corresponding photographs.\u003c\/strong\u003e\u003c\/p\u003e","brand":"GeoFossils","offers":[{"title":"151","offer_id":57593410486645,"sku":null,"price":10.0,"currency_code":"GBP","in_stock":true},{"title":"152","offer_id":57593410519413,"sku":null,"price":10.0,"currency_code":"GBP","in_stock":true},{"title":"153","offer_id":57593410552181,"sku":null,"price":10.0,"currency_code":"GBP","in_stock":true},{"title":"154","offer_id":57593410584949,"sku":null,"price":10.0,"currency_code":"GBP","in_stock":true},{"title":"155","offer_id":57593410617717,"sku":null,"price":10.0,"currency_code":"GBP","in_stock":true},{"title":"156","offer_id":57593410650485,"sku":null,"price":10.0,"currency_code":"GBP","in_stock":true},{"title":"157","offer_id":57593410683253,"sku":null,"price":20.0,"currency_code":"GBP","in_stock":true},{"title":"158","offer_id":57593410716021,"sku":null,"price":20.0,"currency_code":"GBP","in_stock":true},{"title":"159","offer_id":57593410748789,"sku":null,"price":20.0,"currency_code":"GBP","in_stock":true},{"title":"160","offer_id":57593410781557,"sku":null,"price":20.0,"currency_code":"GBP","in_stock":true},{"title":"161","offer_id":57593410814325,"sku":null,"price":20.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1113\/8154\/files\/GeoFossils_Willemite_Mangano_151_2.png?v=1789994105","url":"https:\/\/www.geofossils.com\/products\/willemite-with-mangano-calcite-uv-mineral-zambia","provider":"GeoFossils","version":"1.0","type":"link"}