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 is very intense in some of them and with color zoning in others, more intense in pinacoidal faces. From transparent to translucent, with good brilliance. Rutile inclusions can be observed as thin reddish needles inside the prism. They are very aerial disposed on a rhyolite matrix. Nice miniature. It is very interesting the origin of the word tepetate (tepetatl).