Thomsonite-Ca from Pennsylvania, USA
USA | |
| Rocks & Min.: 21:278. |
| Rocks & Min.: 21:278. |
| |
| Rocks & Min.:59:109-120. |
| Lapham & Geyer, 1965. Mineral Collecting in Pennsylvania |
USA | |
| Rocks & Min.: 21:278. |
| Rocks & Min.: 21:278. |
| |
| Rocks & Min.:59:109-120. |
| Lapham & Geyer, 1965. Mineral Collecting in Pennsylvania |