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The 10 biggest silver mines in the world. Mexico, the world's biggest silver producing country, and Poland host three each of the world's 10 biggest silver mines. Bolivia, Turkey, Peru and Australia host the remaining four. Mining-technology.com profiles the 10 biggest silver mines in the world, based on contained silver reserves.
A large borax deposit was discovered in 1925, and the mining town of Boron was established soon thereafter. This borax deposit is now the world's largest borax mine, which is owned by Rio Tinto Minerals (formerly U.S. Borax). This is operated as an open-pit mine, which is the largest open-pit mine in California.