Malachite pseudomorphs after azurite coated by drusy quartz, 5 cm, from the Piedmont mine, Bloody Basin, Yavapai County, Arizona. Ex D. Wayne Thompson collection; Jeff Scovil photo.
Piedmont Mine, Arizona — famed for malachite pseudomorphs after azurite, coated with quartz; prized for rarity, striking color, and its scarce specimens.
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