No reference known. Particularly NOT mentioned in this reference! "Frondel, C., 1956, Mineral Composition of Gummite, American Mineralogist, v. 41, p. 539-568."

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Reference Type	- plain text -
Original Entry	No reference known. Particularly NOT mentioned in this reference! "Frondel, C., 1956, Mineral Composition of Gummite, American Mineralogist, v. 41, p. 539-568."
Mindat Ref. ID	16024916	Long-form Identifier	mindat:1:5:16024916:9
GUID	0
Full Reference	No reference known. Particularly NOT mentioned in this reference! "Frondel, C., 1956, Mineral Composition of Gummite, American Mineralogist, v. 41, p. 539-568."
Plain Text	No reference known. Particularly NOT mentioned in this reference! "Frondel, C., 1956, Mineral Composition of Gummite, American Mineralogist, v. 41, p. 539-568."

Map of Localities

Mineral Occurrences

Locality	Mineral(s)
Ruggles Mine, Grafton, Grafton County, New Hampshire, USA	ⓘ Sklodowskite

	*Frondel, Clifford (1956) Mineral composition of gummite. American Mineralogist, 41 (7-8) 539-568*
	Smithsonian Institution Mineral Reference Collection No.105590-00 (Gummite, Samarskite).
	. This reference is unreliable, because there are no chemical analyses known for Rhode Island Ottrélite. This reference has been widely used to support the sight identification.
	Ice is photoed and mentioned in this reference on pg 519, 522, and 524
	Not found at this locality: Frondel (1956)
	Chatman, M.L. (1994) U.S. Bureau of Mines Open File Report Mineral Land Assessment (MLA) 2-94: 9-10 (general reference only - site not specifically mentioned).
	Chatman, M.L. (1994) U.S. Bureau of Mines Open File Report Mineral Land Assessment (MLA) 2-94: 9-10 (general reference - adit is not specifically mentioned).
	*Frondel, Clifford (1955) The mineral composition of gummite. Trace Elements Investigations* 508. US Geological Survey doi:10.3133/tei508**
	*Frondel, Clifford, Morgan, Vincent, Waugh, J. L. T. (1956) Lesserite, a new borate mineral. American Mineralogist, 41 (11-12) 927-928*
	*Frondel, Clifford (1956) Memorial of Charles Palache. American Mineralogist, 41 (3-4) 306-314*
	Geological Survey 1972/276: Final Report on Exploration Licence No. 276, Endurance mining NL. [Note: this reference only refers to the general area and not this particular mine].

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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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No reference known. Particularly NOT mentioned in this reference! "Frondel, C., 1956, Mineral Composition of Gummite, American Mineralogist, v. 41, p. 539-568."

Map of Localities

Mineral Occurrences

See Also