Excellent twinned Sphalerite crystals decorated with Chalcopyrite from the famous Madan ore field, Bulgaria. It displays black Sphalerites crystals up to 21mm with strong luster, complex structure and marvelous twinning. They have sharp octahedral shape. Many faces are colored in yellow by epitaxial Chalcopyrite coating. One sharp Galena cube at the top and transparent Quartz crystals enrich the display. In good condition – some small damages. On acrylic base.

Choice specimen!