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Rockport, Essex Co., Massachusetts, USA
The town of Rockport was separated from Gloucester and incorporated in 1840. Granite was quarried here beginning in 1823. Interesting minerals occur in granite quarries and other bedrock exposures of alkaline Cape Ann granite and associated pegmatites and miarolitic cavities.
McKinstry (1921) described some of the town's mineralogical highlights: "More than fifty years ago attention was called to the unusual mineral occurrences at Rockport, on Cape Ann, by J. P. Cooke's description of danalite, a new beryllium mineral, and subsequently of cryophyllite, a new lithium mica. Besides being the type locality for these species, the Rockport quarries have afforded an interesting list of rare-earth minerals, and, perhaps most unusual of all, large tabular crystals of fayalite, normally an utter stranger to granitic rocks."
Mineral List
Mineral list contains entries from the region specified including sub-localities67 entries listed. 28 valid minerals. 2 type localities (valid minerals).
Localities in this Region
USA
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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).
Knowlton, W. J. (1867). On a new mineral from Rockport, Mass. [Cyrtolite](American Journal of Science and Arts, 2nd Series, 44:224-226.)
Shaler, N. S. (1888): The Geology of Cape Ann, Massachusetts. (U. S. Geological Survey Ninth Annual Report)
Merrill, George P. (1889): The Collection of Building and Ornamental Stones in the U.S. National Museum, p. 287.
Warren, Charles H. (1903) Anthophyllite [= Ferro-anthophyllite] and Fayalite from Rockport, Mass. (American Journal of Science, 4th series, 16:337)
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).
Cooke, Josiah P., Jr. (1867): On Cryophyllite. (American Journal of Science and Arts 48:217).
Knowlton, W. J. (1867). On a new mineral from Rockport, Mass. [Cyrtolite](American Journal of Science and Arts, 2nd Series, 44:224-226.)
Shaler, N. S. (1888): The Geology of Cape Ann, Massachusetts. (U. S. Geological Survey Ninth Annual Report)
Merrill, George P. (1889): The Collection of Building and Ornamental Stones in the U.S. National Museum, p. 287.
Warren, Charles H. (1903) Anthophyllite [= Ferro-anthophyllite] and Fayalite from Rockport, Mass. (American Journal of Science, 4th series, 16:337)
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).
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