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Calcite: phantom crystals on matrix - Charcas, San Luis Potosi, Mexico Calcite: phantom crystals on matrix - Charcas, San Luis Potosi, Mexico (shortwave UV)
Fluorite crystals in quartz - Okorusu, Namibia Fluorite crystals in quartz - Okorusu, Namibia (shortwave UV)
Elbaite crystals in quartz - Governador Valadares, Minas Gerais, Brazil Elbaite crystals in quartz - Governador Valadares, Minas Gerais, Brazil (shortwave UV)
Topaz on hyalite opal - Villa Garcia, Zacatecas, Mexico Topaz on hyalite opal - Villa Garcia, Zacatecas, Mexico (shortwave UV)
Fluorite - Ohio Fluorite, Ohio (shortwave UV)
Fluorite - Ohio Fluorite - Ohio (longwave UV)
Fluorite crystals with celestite - Clay Center, Ohio Fluorite crystals with celestite - Clay Center, Ohio (longwave UV)