Mimetite, limonite

Potosí Mine, Santo Domingo (Francisco Portillo), Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua  Mexico

Specimen size: 11.0 × 10.5 × 4.0 cm = 4.33” × 4.13” × 1.57”
Main crystal size: 0.5 × 0.5 cm = 0.20” × 0.20”