Rockport, Essex Co., Massachusetts, USA

Area granite quarries and other bedrock exposures of alkaline Cape Ann granite and associated pegmatites and miarolitic cavities. Granite was quarried in Rockport beginning in 1823.

References:
Cooke, Josiah P., Jr. (1866): On Danalite, a new Mineral Species from the Granite of Rockport, Mass. (American Journal of Science and Arts 47:73-78).

Cooke, Josiah P., Jr. (1867): On Cryophyllite. (American Journal of Science and Arts 48:217).

Merrill, George P. (1889): The Collection of Building and Ornamental Stones in the U.S. National Museum, p. 287.

Sears, John Henry (1905): The Physical Geography, Geology, Mineralogy and Paleontology of Essex County.

McKinstry, H. E. (1921): The Minerals of Rockport, Massachusetts (American Mineralogist 6:56-60).

Palache, Charles (1950): Fayalite at Rockport, Massachusetts. (American Mineralogist 35:877-881).

Dunn, P. (1976): Genthelvite and the helvine group (Mineralogical Magazine 40:627-636).

Lyons, Paul (1976): The Chemistry of Riebeckites of Massachusetts (Mineralogical Magazine 4:473-9).

Bozhilov, K. N. & B. W. Evans (2001): Ferroanthophyllite in Rockport grunerite: A transmission electron microscopy study. (American Mineralogist 86(10):1252-1260).