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USA | |
| Miller, C. E. (1971) Rhode Island Minerals and Their Locations, O. D. Hermes, Ed., University of Rhode Island, Kingston |
| Miller, C. E. (1971) Rhode Island Minerals and Their Locations, O. D. Hermes, Ed., University of Rhode Island, Kingston |
| AmMin 11:334-340 |
| Miller, C.E. (1971) Rhode Island Minerals and Their Locations, O. D. Hermes, Ed., University of Rhode Island, Kingston |
| Miller, C. E. (1971) Rhode Island Minerals and Their Locations, University of Rhode Island, Kingston |
| Miller, C. E. (1971) Rhode Island Minerals and Their Locations, University of Rhode Island, Kingston |
| AmMin 22:279 |
| Museum of Natural History, Roger Williams Park, Providence, R.I. M645 |
| Museum of Natural History, Roger Williams Park Collection |
| George, Gilbert (1972). Latest Finds at Rhode Island Road Cuts(Micromounters of New England no. 17, Feb. 1972). |
| Rocks & Minerals (1986): 61: 286-289 |
| |
| Rocks & Min.: 17:51. |
| George, Gilbert (1969). Latest Finds at Roadcuts in RI (Micromounters of New England Newsletter, Dec. 1969). |
| (1917) Useful minerals of the United States. Bulletin Vol. 624. US Geological Survey doi:10.3133/b624 |
Grants Mills, Cumberland, Providence County, Rhode Island, USA