Mineralpedia Details for Guanacoite
Named after the type locality at the El Guanaco mine in the Antofagasta Region of Chile. An additional locality for Guanacoite is at the Taghouni mine in the Bou Azzer district of Morocco. It occurs at the type locality as blue to pale blue prismatic to acicular crystals, and associated with arhbarite, conichalcite, olivenite, chrysocolla, brochantite, quartz, and enargite. In Bou Azzer it forms in assicaition with quartz, dolomite, chalcopyrite, chromite, cuprite, malachite, and agardite-Ce.
Ref. Witzke, T. et al. and the European Journal of Mineralogy, November, December 2006 v. 18 no. 6 p. 813-821
Guanacoite from El Guanaco mine, Santa Catalina, Antofagasta, Chile
Deep blue, bladed, glassy crystals to 0.75mm lining vugs of Arhbarite.