A superb calcite on quartz from a one-off pocket at the Borieva Mine, in the Madan ore field, within the Rhodope Mtns., of Bulgaria! This pocket was discovered in late July of 2017, and I acquired the bulk of the find. This specimen features a single calcite crystal that has grown over a group of elongated quartz crystals, colored green from inclusions of chlorite. The calcite is amber to yellow in color and is interesting, due to the fact that it is a scalenohedral crystal, comprised of hundreds of flattened and stacked rhombohedrons. The arrangement of the crystals is highly aesthetic and the contrast of color is outstanding. The calcite is doubly-terminated and complete all around. No significant damage.