Smoky Quartz from selected localities.
USA | |
| Mineral Collecting in PA (1976) Geyer, Smith, Barnes, pgs. 73-75 |
| Lapham & Geyer, 1965. Mineral Collecting in Pennsylvania |
USA | |
| Mineral Collecting in PA (1976) Geyer, Smith, Barnes, pgs. 73-75 |
| Lapham & Geyer, 1965. Mineral Collecting in Pennsylvania |