| Title | Fine-grained mica Schist, Gilpin County, Colorado |
| Description | This is a fine grained schist that has been deformed and now contains “wavy” layers. Although no minerals can be seen in hand specimen, a microscope reveals biotite, chlorite, muscovite and quartz. This sample is 10 cm across. |
| Location | USA ▹ Colorado ▹ Gilpin. Near Central City. |
| Photographer | Mike Davis. 2001-04-26. |
| Collection | Ward’s University Rock Collection #187. |
| Key words | mica, schist, Colorado |
| Tech details | 824 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera, 60mm Nikon AF micro lens. |
| GeoDIL number | 425 |
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