Opal from Devon, England, UK
UK | |
| [var. Common Opal] Alysson Rowan collection |
| W. A. E. Usshee (1912) The geology of the country around Ivybridge and Modbury. Explanation of Sheet 349 |
| Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London. |
| Solly, R.H. (1888): Mineralogical Magazine 6, 202-211 |
| Collection Of Bernie Millington |
| Bernie Millington Collection |
Wheal Katherine, Dartmoor Forest, West Devon, Devon, England, UK