Mimetite

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

Specimen size: 3.1 × 2.9 × 1.8 cm = 1.22” × 1.14” × 0.71”
Main crystal size: 1.2 × 1.2 × 1.0 cm = 0.47” × 0.47” × 0.39”