Sierra Metals Inc. (TSXV: SMT)

Number one on our list of top junior mining companies is Sierra Metals Inc. The Canadian mining company is actively engaged in the business of acquisitions, exploration, extraction, production and commercialization of mineral concentrates for silver, copper, lead, zinc and gold in Mexico and Peru. Formerly known as Dia Bras Exploration Inc., Sierra Metals owns and operates three mines in commercial production: the Yauriocha mine in Peru, the Bolivar and Cusi mines in Mexico.
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