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Rockport Granite Company quarries, Rockport, Essex Co., Massachusetts, USA
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The Rockport Granite Company owned a number of quarries and was in business from 1865 to 1933. At its peak of operation, the company employed more than 800 men.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Actinolite
'Allanite'
'Apatite'
Astrophyllite
'Biotite'
Calcite
Danalite
Fayalite
'Fergusonite'
Fluorite
var: Yttrocerite ?
Grunerite
Hedenbergite
Hematite
Ilmenite
'Limonite'
Magnetite
Microcline
Molybdenite
Quartz
var: Blue Quartz
Quartz
var: Smoky Quartz

Thorite
Zircon
var: Cyrtolite


32 entries listed. 15 valid minerals. 1 erroneous literature entry.

Localities in this Region

USA

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References

Merrill, George P. (1889): The Collection of Building and Ornamental Stones in the U.S. National Museum, p. 554.

Sears, J. H. (1894): Geological and Mineralogical Notes, No. 9 in Bulletin of the Essex Institute, vol. 26.

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

Dale, Thomas Nelson (1908): The Chief Commercial Granites of MA, NH, and RI (USGS Bulletin 354).

Brayley, Arthur W. (1913): History of the Granite Industry of New England.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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