"They were laborers from the mines in western Chihuahua"
Labourers carrying silver ore within Mexican mine (c. 1890-1923)
Public DomainLabourers carrying silver ore within Mexican mine (c. 1890-1923) - Credit: Frank and Frances Carpenter Collection

The principal industry of the state of Chihuauhua is mining – its mineral resources including gold, silver, copper, mercury, lead and coal. The silver mines of Chihuahua are among the richest in Mexico, and include the famous mining districts of Batopilas, Chihuahuilla, Cosihuiriachic, Jesus Maria, Parral, and Santa Eulalia or Chihuahua el Viejo.