[1] The mine has thirteen known ore bodies, overwhelmingly of silver, but also with smaller quantities of gold, zinc and lead.

[3] The mine started operating in 1970 and was owned by Industriales Peñoles S.A. de C.V. at the time.

[2] Aurcana Corporation became the primary owner of the mine in 2006,[4] expanding its share of ownership to over 99% in 2012.

[6] The 2013 study Influencia de Jales Mineros Sobre El Río Maconí, Queretaro, y Evaluación Del Proceso de Atenuación Natural Por Dispersión (English: Influence of mining tailings on the Maconí River, Queretaro, and evaluation of the natural attenuation process by dispersion), published in Boletín de la Sociedad Geológica Mexicana (the journal of the Mexican Geological Society) reported that "concentration in the water-soluble fraction exceeds 0.5 mg/L (permissible level indicated in NOM-147)"[note 1] downstream of tailings dam number three.

[1] In 2023, the mine was purchased from Dalu S. à r. l. by Excellon Resources for $50 million.