Actinolite from selected localities.
USA | |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 101; Creasy, S.C. & G.L. Quick (1955), Copper deposits of part of Helvetia mining district, Pima Co., AZ, USGS Bull. 1027-F: 312. |
| Rolf Luetcke |
USA | |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 101; Creasy, S.C. & G.L. Quick (1955), Copper deposits of part of Helvetia mining district, Pima Co., AZ, USGS Bull. 1027-F: 312. |
| Rolf Luetcke |
Omega Mine, Monument Mountain, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA