Chalcanthite from Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA
USA | |
| Creasey, S.C. & G.L. Quick (1955), Copper deposits of part of Helvetia mining district, Pima Co., AZ, USGS Bull. 1027-F: 314-315 |
| collected by and in the collection of Eckhard D. Stuart |
Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 114. |
Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA