Fluorescent Calcite on Multigeneration Sphalerite Tetrahedrons – Krushev Dol Mine, Madan, Bulgaria. An exquisite and rare collector’s specimen from the famous Krushev Dol Mine in Madan, Bulgaria. This piece features striking, fluorescent calcite that glows a vibrant pink under UV light, set upon well-formed, multigeneration sphalerite tetrahedrons. The contrasting crystal habits and the vivid fluorescence create a truly captivating visual effect that will enhance any mineral collection. The Krushev Dol Mine is celebrated worldwide for producing distinctive and high-quality mineral specimens, making this example highly desirable among enthusiasts. Such unique fluorescence and the interplay with classic sphalerite habits reflect the remarkable geology of the Madan area. Perfect for collectors specializing in fluorescent minerals or those seeking a show-stopping centerpiece with authentic provenance from Bulgaria’s legendary mining district.