Chalcopyrite crystals with sphalerite and galena. From the old mining town of Creede. Measures 2.6 x 2.5 cm.
Photo courtesy of The Mineral Gallery.
A single, brassy chalcopyrite crystal measuring 22 x 22 x 10 mm from the Alice Glory Hole north of Idaho Springs.
Photo courtesy of Dan Weinrich Minerals.
Gemmy little rhodochrosite rhomb on tetrahedrite with golden chalcopyrite from the Sweet Home Mine near Alma. Measures 6.5 x 4.7 cm.
Photo courtesy of The Mineral Gallery.