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Duffy Granite quarry, Concord, Merrimack Co., New Hampshire, USA
Granite quarry on Rattlesnake Hill, opened in 1906.References
Dale, T. N. (1908). The Chief Commercial Granites of Massachusetts, New Hampshire, and Rhode Island (USGS Bulletin 354.)Mineral List
| Microcline | Muscovite | Quartz |
3 entries listed. 3 valid minerals.
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Updated Mineral Entry: SericiteFrom Van King, 22nd May 2013 18:57:41