San Antonio Mine (San Antonio el Grande Mine), chimenea Cox, level 4, East Camp, Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua Mexico (2011)
Specimen size: 2.1 × 2 × 1.1 cm = 0.83” × 0.79” × 0.43” Main crystal size: 0.3 × 0.2 cm = 0.12” × 0.08”