Specularite from Greenlee County, Arizona, USA
USA | |
| Simons, F.S. (1964) Geology of the Klondyke Quadrangle Graham and Pinal Counties. USGS Professional Paper 461: 136, 137. MRDS database Dep. ID #10039433, MRDS ID #M050075. |
| MRDS database Dep. ID #10048280, MRDS ID #M800404. |