Calcite from Cass County, Nebraska, USA
USA | |
| The Minerals and Gemstones of Nebraska CSD U Neb EC 2 |
| Mr. Scott Williams (self-collected). |
| The Minerals and Gemstones of Nebraska CSD U Neb EC 2 |
Zeitner, 1956. Midwest Gem Trails | |
| The Minerals and Gemstones of Nebraska CSD U Neb EC 2 |
Schwaberer Quarry, Nehawka, Cass County, Nebraska, USA