|
USA | |
| C. Lemanski, Jr. (re-entry lost Mindat data). |
| Ream, Lanny R. (2004) Idaho Minerals (2nd ed.) L. R. Ream Publishing, Coeur d'Alene, ID. Tschernich, Rudy D., Wise, W. S. (1982) Paulingite: variations in composition. American Mineralogist, 67. 799-803 |
| [var. Precious Opal] Extra Lapis - English No. 10 Opal |
| Dake, H. C. (1956) Northwest Gem Trails - A Field Guide for the Gem Hunter, Mineral Collector and Tourist (2nd ed.) Gembooks. |
- Monumental Creek Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |