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: 3.4 × 2.9 × 1.8 cm = 1.34” × 1.14” × 0.71” Main crystal size: 1.5 × 0.5 cm = 0.59” × 0.20”