Quartz from selected localities.
USA | |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
Raabe, K. C. & Sack, R. O. (1984): Growth zoning in tetrahedrite-tennantite from the Hock Hocking mine, Alma, Colorado. Canadian Mineralogist 22, 577-582. | |
Singewald, Quentin Dreyer; Butler, Bert Sylvenus (1941) Ore deposits in the vicinity of the London fault of Colorado. USGS Bulletin: 911 | |
USGS: Geological Survey Circular 294 | |
Metal Mining Mining Geology, A.I.M.E. (1937): 432, 440.; Singewald, Quentin Dreyer; Butler, Bert Sylvenus (1941) Ore deposits in the vicinity of the London fault of Colorado. USGS Bulletin: 911 | |
Metal Mining Mining Geology, A.I.M.E. (1937): 432, 437. | |
| Metal Mining Mining Geology, A.I.M.E. (1937): 432, 440.; Singewald, Quentin Dreyer; Butler, Bert Sylvenus (1941) Ore deposits in the vicinity of the London fault of Colorado. USGS Bulletin: 911 |
| [Chalcedony var: Agate] Minerals of Colorado (1997) Eckel, E. B. |
[Chalcedony var: Agate] Minerals of Colorado (1997) Eckel, E. B. | |
[Chalcedony] Minerals of Colorado (1997) Eckel, E. B. | |
Minerals of Colorado (1997) E.B. Eckel |