Muscovite from Copper Mountain Group (Including Sherbandy Group), Quartzburg Mining District (Comer Mining District), Grant County, Oregon, USA
USA | |
| [var. Sericite] (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
USA | |
| [var. Sericite] (2005) Mineral Resources Data System (MRDS), US Geological Survey. |