| Anthony, John W., Bideaux, Richard A., Bladh, Kenneth W., Nichols, Monte C. - Eds. (2016) Handbook of Mineralogy. https://www.handbookofmineralogy.org/ Cooke, Josiah P. Jr. (1966) XI - On Danalite, a new Mineral Species from the Granite of Rockport, Mass. American Journal Of Science, S. 2 Vol. 42. 73-79 Sears, J. H.(1905) The Physical Geography, Geology, Mineralogy and Paleontology of Essex County. Yale Peabody Museum no. 777 |
Rockport, Essex County, Massachusetts, USA