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USA | |
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| Rocks & Min.: 59: 157-183 (1984), Peters, Joseph J.
Mins. of NYC & Its Environs, NY Min. Club (1931), Manchester, J.G. |
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| [Opal-A var. Opal-AN] Manchester, James G. (1931) The Minerals of New York City and its Environs. Bulletin of the New York Mineralogical Club Vol. 3 (1) New York Mineralogical Club |
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| [Opal-A var. Opal-AN] Manchester, James G. (1931) The Minerals of New York City and its Environs. Bulletin of the New York Mineralogical Club Vol. 3 (1) New York Mineralogical Club
Canfield (1889). |
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| [Opal-A var. Opal-AN] Mins. of NYC & Its Environs, NY Min. Club., Vol. 3 (1931), edited by J.G. Manchester |
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| NJ State Geol. Ann. Rpt. (1906): Plate XXIII text. |
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| The Minerals of NYC & Its Environs, NY Min. Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 71. |
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| [var. Isopyre] The Iron Mines of New Jersey (1910), Bayley:358-362
Canfield, F.A. (1898) Catalogue of Minerals found in New Jersey. in Final Report of the State Geologists. |
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| [Opal-A var. Opal-AN] NJ State Geol. Ann. Rpt. (1856): 175. |
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| The Iron Mines of NJ (1910), Bayley:404.
NJ State Geol. Ann. Rpt (1856):197. |
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| Mins. of NYC & Environs, NY Min. Club (1931), Manchester. |
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| [Opal-A var. Opal-AN] Rocks & Min.: 59:157-183, Peters, Joseph J. (1984).
American Muiseum of Nat. History, NY, specimen(s)
Paterson, NJ, Museum specimens |
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| Kent, B.P. and Butkowski, B. (2000): Minerals of the Millington Quarry, Somerset County, New Jersey. Mineralogical Record, 31: 411. |
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| Speiser, Robert (1978) A Quest for New Jersey Minerals: 10.(privately published). |
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| [Opal-A var. Opal-AN] collected by David Bernstein- 10/2009 |
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| King, Vandall T, et. al. 2022, Mineralogy of Franklin and Ogdensburg, New Jersey |
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| Kuitems, Steven, Orosz, Joe, and Nikischer, Tony (2009) Mineral #357 Found at Franklin, NJ, Picking Table v50 (1), p 17. |
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| Manchester, James G. (1931) The Minerals of New York City and its Environs. Bulletin of the New York Mineralogical Club Vol. 3 (1) New York Mineralogical Club |
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| Yale Peabody Museum 3979 |
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| Manchester, James G. (1931) The Minerals of New York City and its Environs. Bulletin of the New York Mineralogical Club Vol. 3 (1) New York Mineralogical Club |
Chimney Rock Quarry, Bridgewater Township, Somerset County, New Jersey, USA