Ron Wolf2025-03-122025-03-12https://hdl.handle.net/11124/180031Photographed by Ron Wolf.Blue caledonite on yellow brown matrix.born digitaldigital photographsCopyright Ron Wolf.In copyright - non-commercial use permitted: http://rightsstatements.org/vocab/InC-NC/1.0/mineral and rock specimenscaledoniteMinerals -- Arizona -- Pinal CountyMammoth Mining District (Ariz.)Mammoth - St. Anthony Mine (Ariz.)Image