A bold and well-crystallized pyrite specimen from the legendary Huanzala Mine in Peru — one of the world's most celebrated localities for pyrite. The main pyrite crystal displays excellent metallic luster with characteristic striated faces and sharp cubic-to-octahedral geometry. Perched on the pyrite is a cluster of dark siderite rosettes with their typical scaly, lamellar habit, accompanied by white calcite microcrystals — creating a classic three-mineral combination from this iconic Peruvian deposit.