Opal from Crabtree Creek, Yancey County, North Carolina, USA
USA | |
| [Opal-A var. Opal-AN] (2005) Mineral Resources Data System (MRDS), US Geological Survey. Rocks and Minerals (1985) 60:84-93,99 |
| [Opal-A var. Opal-AN] Rocks & Min.:11:58. |
USA | |
| [Opal-A var. Opal-AN] (2005) Mineral Resources Data System (MRDS), US Geological Survey. Rocks and Minerals (1985) 60:84-93,99 |
| [Opal-A var. Opal-AN] Rocks & Min.:11:58. |