- Miniature, 5.7 x 5.0 x 2.6 cm
- Sierra Pena Blanca Uranium Mine, near Aldama, Chihuahua, Mexico
- Ex. Martin Zinn
This piece has dozens of lustrous, deep red-colored crystals to 1 cm. They are very large and sharp for the species. This is a rich specimen from a small pocket found in the 1980s that I know many people value as the best-of-species find. Dr. JP Goodell was going through the dumps on this old defunct mine, when he found the small pocket. The best specimens found their way quickly into prominent collections (for instance, the story is given in the Barlow book, page 349). I have seen only 4 pieces turn up over the last ten years, from this pocket.