Mineralpedia Details for Plancheite
Named after a Mr. Planche who provided the original samples for study. A rare mineral, Plancheite can be found in the Congo Republic, the Democratic republic of Congo, Namibia, England, the United States, Japan, and Argentina, among a couple others, as a secondary mineral in oxidized copper deposits. Plancheite is found associated with chrysocolla, dioptase, mamachite, conichalcite, and tenorite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/plancheite.pdf
Plancheite from Eagle Eye mine, La Paz Co., Arizona, United States
Beautiful sky blue sprays to 1mm in vug of Chrysocola matrix.