(Mina San Antonio el Grande, Santa Eulalia, Mun. de Aquiles Serdán, Chihuahua, Mexico)
Ref.: Min.Rec.: 14:169-171; Panczner (1987): 77, 85, 89, 91-92, 96-98, 101, 103, 108, 118, 122-123, 128, 137, 139, 141, 145-146, 150, 156, 162, 167, 173, 179-180, 182, 188-189, 193, 195, 198, 200, 210, 216-217, 220, 224, 226, 228, 232, 234, 236, 238, 242, 255, 257, 260, 263, 265, 266, 268, 274, 276, 290, 296, 297, 302, 310, 316-317, 319, 322, 328, 330, 332, 339-340, 348, 350, 361, 366, 376, 379, 381, 387, 390-391, 393, 395. Mine features Cock's ore body.