Quartz from Vulcan Mining District (Cebolla Mining District; Domingo Mining District), Gunnison County, Colorado, USA
USA | |
| P. A. Drobeck, (1981) Proterozoic syngenetic massive sulfide deposits in the Gunnison gold belt, Colorado. in 32nd Field Conference New Mexico Geological Society, pp. 279-286. |
| www.cannonmicroprobe.com/Mineral_Specimens.htm |