Oligoclase from Beaver County, Utah, USA
USA | |
| Sainsbury, C. L. (1962) Mineralogical Notes: Helvite near Beaver, Utah. American Mineralogist, 47 (3-4) 395-398 |
| Matthias Rhinelander |
USA | |
| Sainsbury, C. L. (1962) Mineralogical Notes: Helvite near Beaver, Utah. American Mineralogist, 47 (3-4) 395-398 |
| Matthias Rhinelander |