Muscovite from Kelley Mine, Butte Mining District (Summit Valley Mining District), Silver Bow County, Montana, USA
USA | |
| [var. Sericite] The Mineralogy of The Butte District, Montana Guilbert and Zeihen |
USA | |
| [var. Sericite] The Mineralogy of The Butte District, Montana Guilbert and Zeihen |