Splendid morphology for this Chalcopyrite-Sphalerite combo on Quartz druse from the famous Madan ore field, Bulgaria. It displays black Sphalerite tetrahedrons growing atop transparent Quartz crystals. Well isolated yellow Chalcopyrite epitaxial crystals decorate the Sphalerite making excellent formations of mutual intergrowth and penetration – really amazing. Beautiful display specimen with excellent focal point. In good condition – some small nicks and Quartz damages., Aesthetic specimen!
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