|
USA | |
| [var. Amethyst] Mineralogical Record (1990) 21:203-213 Museum of Natural History, Roger Williams Park, Providence, R.I. G3748 5986 |
| [var. Smoky Quartz] |
| [var. Smoky Quartz] |
| Miller, C. E. (1971) Rhode Island Minerals and Their Locations, O. D. Hermes, Ed., University of Rhode Island, Kingston |
| |
| [var. Smoky Quartz] Dale, T. N. (1908). The Chief Commercial Granites of Massachusetts, New Hampshire, and Rhode Island (USGS Bulletin 354.) |
| Miller, C. E. (1971) Rhode Island Minerals and Their Locations, O. D. Hermes, Ed., University of Rhode Island, Kingston |
| [var. Smoky Quartz] |
| Miller, C. E. (1971) Rhode Island Minerals and Their Locations, O. D. Hermes, Ed., University of Rhode Island, Kingston |
| Harvard Mineralogical Museum, no. 117267 |
| [var. Smoky Quartz] |