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Feldspar Group from North Andes plate

Colombia
 
  • Boyacá Department
    • Guavió-Guatéque mining district
      • Chivor Municipality
O'Neil, P. (1983) Planet Earth - Gemstones. Time-Life Books, Arlington, Virginia, USA, 176 pages.
  • Cauca Department
    • Mercaderes Municipality
Manuela Zeug, Andrés Ignacio, Rodríguez Vargas, Lutz Nasdala (2017): Spectroscopic study of inclusions in gem corundum from Mercaderes, Cauca, Colombia. Physics and Chemistry of Minerals 44, 221-233.
Ecuador
 
  • Pichincha Province
    • Quito Canton
      • Quito
        • Tumbaco
vom Rath, G.(1872): Mineralogische Mitteilungen, Fortsetzung XI (Tridymit von Quito), Annalen der Physik und Chemie, Vol. 223, 279-282
 
Mineral and/or Locality  
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