Yellowish globular aggregates of this rare uranyl tellurite, whose type locality is this Mexican mine. It is accompanied by green aggregates of emmonsite. It comes with the David Shannon label (2003) and belonged to the Nicolau collection (Barcelona).

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Everybody knows about Milpillas secondary copper minerals, but this locality is not well-known by the complex pyrite crystals coated by bornite. We propose one of the few specimens I have seen. In this sample we can see the dominant forms of the cube, but also the octahedron, surrounded by trapezohedron and possibly the dodecahedron on edges. Bright and well disposed in a solid matrix. It is a true crystallographic gem.

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Very aesthetic group of aerial malachite crystals pseudomorphic after azurite showing a tabular shape with rounded faces. Color is deep green with a very well marked velvet luster. Good specimen from Milpillas.