Fresnillo plc is a silver and gold mining company. The Company, along with its subsidiaries, is engaged in the mining and beneficiation of non-ferrous minerals, and the sale of related production. The primary contents of this production include silver, gold, lead and zinc. As of December 31, 2011, the Company had five operating mines: Fresnillo, Herradura, Cienega, Soledad-Dipolos and Saucito. Fresnillo is a silver mine, located 60 kilometers northwest of Zacatecas. Saucito is eight kilometres southwest of the Fresnillo mine. Commercial production at Saucito commenced during the year ended December 31, 2011. Cienega is located near the community of Nuestra Senora de la Cienega. Its Herradura mine is located 125 kilometers northwest from the town of Caborca in the State of Sonora. Soledad-Dipolos mine is located nine kilometers northwest of the Herradura mine. As of December 31, 2011, Industrias Penoles S.A.B. de C.V. (Penoles) owned a 77% interest in the Company.