Opal from Grand Central Mine, Contention-Grand Central Mine group, Tombstone Mining District, Cochise County, Arizona, USA
USA | |
| [Opal-A var. Opal-AN] Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 315 Williams, S. A. (1979) Girdite, oboyerite, fairbankite, and winstanleyite, four new tellurium minerals from Tombstone, Arizona. Mineralogical Magazine, 43 (328) 453-457 doi:10.1180/minmag.1979.043.328.01 Rocks & Min.:57:12. |
Grand Central Mine, Contention-Grand Central Mine group, Tombstone Mining District, Cochise County, Arizona, USA