A nice cluster of topaz crystals with very well defined faces and edges, with a developed prism, cuted by the basal pinacoid and other order prism faces on top. The tile color presents zoning, more intense in pinacoidal faces. From transparent to translucent, with good brilliance. With an aesthetic opal-AN aggregate on one of the main crystals. Opal presents intense green fluorescence under SW-UV light. Rutile inclusions can be observed as thin needles in the topaz prisms and in the opal. One of the topaz crystals presents a minor damage. They are very aerial disposed on a rhyolite matrix. Nice miniature. It is very interesting the origin of the word tepetate (tepetatl).