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Opal from

USA
 
  • Arizona
    • Apache County
      • Concho
        • Concho Creek
Peirce, H.W. (1990), AZ Geol. Sur. Industrial Minerals card file.
Phillips, K.A. (1987), Arizona Industrial Minerals AZ Dept. of Mines and Mineral Resources Mineral Rpt. 4.
Peirce, H.W. (1969), Diatomite in mineral and water resources f Arizona, US Govt. printing office, Washignton: 337-342
    • Greenlee County
      • Morenci
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193
Moolick, R. T., Durek, J. J. (1966) The Morenci District. In Geology of the Porphyry Copper Deposits. The University of Arizona Press, Tucson, AZ. p.221-232.
  • New Mexico
    • Catron County
      • Taylor Creek Mining District
NMGS 37th Field Conference
    • Grant County
Northrop, Stuart A., LaBruzza, F.A. (1996) Minerals of New Mexico (3rd ed.) University of New Mexico Press, Albuquerque, NM.
 
Mineral and/or Locality  
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