Mimetite

specimen number:
2063055

location:
Congreso-Leon Mine, San Pedro Corralitos, Casas Grandes, Chihuahua, Mexico

description:
Beautiful golden yellow botryoidal crystallized mimetite across a small amount of matrix. This is in good condition. The specimen would have been collected by Benny Fenn in the late 1960s. Choice miniature for this Mexican classic.

The Congreso-Leon Mine in San Pedro Corralitos, Casas Grandes, Chihuahua, Mexico, is a historic mining locality embedded within an oxidized hydrothermal vein system rich in base metals. Historically worked on a modest scale for lead and silver, the mine gained international renown among mineral collectors during the late 20th century for producing world-class specimens of mimetite. Geologically, the area features mineralized veins cutting through altered carbonate rocks, where intense weathering and secondary oxidation processes transformed primary ore bodies into cavities filled with vibrant minerals. Within these oxidized zones, mimetite developed as striking, bright yellow to orange botryoidal crystals, cementing the district's status as one of the premier global sources for this secondary mineral.

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