Granite pegmatite. Oxford pegmatite field.
Originally a mineral collector's site in late 1870's. Opened by Nathan Perry and Edgar D. Andrews in early 1880's. Originally called Harndon Hill, but named changed in a complex change of names about 1917. Operated solely by Nathan Perry by 1882. Operated for massive topaz in 1970's by Col. Joseph Pollack of Harrison, Maine.
The locality is the type locality for hamlinite, now regarded as a synonym for goyazite.
References:
Hidden, W. E. and Penfield. S. L., 1890, On Hamlinite a new rhombohedral mineral from the Herderite Locality at Stoneham, Maine, American Journal of Science, third series, v. 39: 511-513.
Thompson, W, Joyner, D., Woodman, R., and King, V., 1998, Maine Mineral Localities, 3rd ed.
King, V. and Foord, E., 1994, Mineralogy of Maine, Descriptive Mineralogy, v. 1.
Woodard, H. H. (1951): The Geology and Paragenesis of the Lord Hill pegmatite, Stoneham, Maine. American Mineralogist (1951): 36, 869-883.
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Map Reference: 44°13'26"N , 70°57'11"W
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Mineral List:59 entries listed. 50 valid minerals. 4 erroneous literature entries.
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