Pyrite dodecahedral from Peru (6kg) on brass base
PUMI1741-3
This large Pyrite block from Peru is not only incredibly shining, But it is also a rare a cluster of Pyritohedron: it is an irregular pentagonal dodecahedron, A form of crystal only seen in Pyrite. Whatever the shape of the crystals, you can observe a mineral that deserves its nickname "fool's gold", so much its brightness is remarkable. A gem.
