{"title":"Second Chance Mine","description":"\u003cp\u003eTombstone, Tombstone Mining District, Cochise County, Arizona, USA\u003c\/p\u003e","products":[{"product_id":"min3170fluorite","title":"Fluorite","description":"\u003cp\u003eFluorite belongs to the isometric crystal class and most often occurs as cubes, with octahedral forms far less common. Tombstone fluorites range from octahedra to cuboctahedra, with some showing rounded sides or appearing nearly spherical. The faces often carry an unusual surface texture, where many micro-fluorite faces combine to form a single face of a larger octahedron. Paired with the translucency of the crystals, this gives them a luminous quality, as light reflects off countless tiny surfaces across a single face. This specimen shows lilac coloration throughout, deepening to darker purple in concentrated areas to create an almost speckled appearance. With densely packed crystals and unique coloration, this is an excellent representative of the beauty of Tombstone fluorites!\u003c\/p\u003e","brand":"Adamantine Minerals","offers":[{"title":"Default Title","offer_id":53711527510289,"sku":"min3170","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0900\/2277\/3009\/files\/min3170_2.jpg?v=1782849624"},{"product_id":"min3169fluorite-and-orthoclase","title":"Fluorite and Orthoclase","description":"This specimen from Second Chance Mine beautifully displays a pattern referred to by collectors as 'boxwork.' Here, the boxwork structure appears as glittery white planes of quartz crystals extending between groupings of vibrant purple fluorite crystals. These planes of while quartz formed after calcite as a type of pseudomorph known as an epimorph. In an epimorph, one mineral forms as a coating along the surfaces of another, and the original mineral later dissolves, leaving a cast of its shape. \n\n","brand":"Adamantine Minerals","offers":[{"title":"Default Title","offer_id":53711529672977,"sku":"min3169","price":42.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0900\/2277\/3009\/files\/min3169_1.jpg?v=1782849615"},{"product_id":"min3171fluorite","title":"Fluorite","description":"\u003cp\u003eAn excellent miniature-sized specimen from Second Chance Mine showcasing beautiful purple fluorite crystals grouped along white planes of quartz that formed as epimorphs after calcite. An attractive testament to the unique mineralogy of Tombstone fluorite!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTombstone fluorite specimens stand apart from other fluorites for several reasons. Fluorite is a member of the isometric crystal class and occurs in both cubic and octahedral forms, though cubic is far more common. Tombstone crystals, however, range from octahedra to cuboctahedra, with some displaying rounded sides or appearing nearly spherical. While this morphology alone sets them apart, their pairings with quartz and orthoclase add further mineralogical intrigue.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSome specimens, such as this one, feature a type of pseudomorph known as an epimorph, seen here as quartz after calcite. In an epimorph, one mineral forms as a coating along the surfaces of another, and the original mineral later dissolves, leaving a cast of its shape behind. This replacement and dissolution occurred in heavily fractured limestones, where hydrothermal fluids moved through the rock, depositing quartz on calcite while dissolving the calcite itself. The process points to an acidic environment, since quartz forms under the same conditions that dissolve calcite.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eOnce the quartz pseudomorphs had formed, fluorite filled the voids around them. In some specimens, this appears as glittery white planes extending between groupings of purple fluorite, a pattern collectors often call 'boxwork' or 'boxwork structures.'\u003c\/p\u003e","brand":"Adamantine Minerals","offers":[{"title":"Default Title","offer_id":53711534784785,"sku":"min3171","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0900\/2277\/3009\/files\/min3171_3.jpg?v=1782849554"},{"product_id":"min3173fluorite-and-quartz","title":"Fluorite and Quartz","description":"\u003cp\u003eThe region now known as the Tombstone mining district was once covered by the shallow waters of a small sea. Over time, many layers of sediment accumulated to eventually form a thick package of sedimentary rocks. Tectonic activity later gave rise to the Tombstone Hills, and various intrusive events invaded and altered the metasedimentary rocks of the region. This multi-stage geologic history provided the specific conditions needed to form these unique and intriguing specimens. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTombstone fluorite specimens stand apart from other fluorites for several reasons. Fluorite is a member of the isometric crystal class and occurs in both cubic and octahedral forms, though cubic is far more common. Tombstone crystals, however, range from octahedra to cuboctahedra, with some displaying rounded sides or appearing nearly spherical. While this morphology alone sets them apart, their pairings with quartz and orthoclase add further mineralogical intrigue.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSome specimens feature a type of pseudomorph known as an epimorph, seen in this locality as quartz after scalenohedral calcite. In an epimorph, one mineral forms as a coating along the surfaces of another, and the original mineral later dissolves, leaving a cast of its shape. This replacement and dissolution occurred in heavily fractured limestones, where hydrothermal fluids moved through the rock, depositing quartz on scalenohedral calcite while dissolving the calcite itself. The process points to an acidic environment, since quartz forms under the same conditions that dissolve calcite.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eOnce the quartz pseudomorphs had formed, fluorite filled the voids around them. In some specimens, this appears as glittery white planes extending between groupings of purple fluorite, a pattern collectors often call 'boxwork' or 'boxwork structures.' Orthoclase is also present in some specimens, generally appearing as groupings of small, cream-colored rhombohedrons that peek out from beneath the fluorite crystals.\u003c\/p\u003e","brand":"Adamantine Minerals","offers":[{"title":"Default Title","offer_id":53711551856913,"sku":"min3173","price":55.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0900\/2277\/3009\/files\/min3173_3.jpg?v=1782849645"},{"product_id":"min3172fluorite-on-quartz-epimorph-after-calcite","title":"Fluorite on Quartz Epimorph after Calcite","description":"From Second Chance Mine in Tombstone, Arizona, this dramatic pseudomorph showcases the intriguing mineralogy of this locality. Octahedral fluorites with a soft purple glow fill an epimorph of quartz after calcite. The scalenohedral morphology of the calcites is well preserved by an attractive crystalline cast of snowy white quartz. An opening on one side shows the beautiful mineralization of purple fluorite within.\n\nAn epimorph is a specific type of pseudomorph. In an epimorph, one mineral forms as a coating along the surfaces of another, and the original mineral later dissolves, leaving a cast of its shape behind. This replacement and dissolution occurred at this locality in heavily fractured limestones, where hydrothermal fluids moved through the rock, depositing quartz on calcite while dissolving the calcite itself. The process points to an acidic environment, since quartz forms under the same conditions that dissolve calcite. Once the quartz pseudomorphs had formed, fluorite filled the voids around them. \n","brand":"Adamantine Minerals","offers":[{"title":"Default Title","offer_id":54093074530577,"sku":"min3172","price":230.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0900\/2277\/3009\/files\/min3172_3.jpg?v=1782849607"},{"product_id":"min3224fluorite-and-quartz-after-calcite","title":"Fluorite and Quartz After Calcite","description":"\u003cp\u003eVibrant purple fluorite crystals contrasted by snowy white quartz epimorphs after scalenohedral calcite from Second Chance Mine in Tombstone, Arizona. An intriguing piece showcasing intricate multi-stage mineralization.\u003c\/p\u003e\n\u003cp\u003eSome specimens, such as this one, feature a type of pseudomorph known as an epimorph, seen here as quartz after calcite. In an epimorph, one mineral forms as a coating along the surfaces of another, and the original mineral later dissolves, leaving a cast of its shape behind. This replacement and dissolution occurred in heavily fractured limestones, where hydrothermal fluids moved through the rock, depositing quartz on calcite while dissolving the calcite itself. The process points to an acidic environment, since quartz forms under the same conditions that dissolve calcite.\u003c\/p\u003e","brand":"Adamantine Minerals","offers":[{"title":"Default Title","offer_id":54120332329233,"sku":"min3224","price":110.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0900\/2277\/3009\/files\/min3224-fluorite-tombstone-arizona-purple-crystal-pseudomorph-calcite-quartz-epimorph_2.jpg?v=1786493964"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0900\/2277\/3009\/collections\/min3169_1.jpg?v=1788854047","url":"https:\/\/adamantineminerals.com\/collections\/second-chance-mine.oembed","provider":"Adamantine Minerals","version":"1.0","type":"link"}