page_title: Rio Tinto Borax Mine
hierarchical_section_title: Rio Tinto Borax Mine
caption_attribution_description: English: This photograph from an astronaut on the International Space Station features the former U.S. Borax mine, located to the northwest of Boron, California. Now owned by the Rio Tinto Group, it is the largest open-pit mine in California and is among the largest borate mines in the world.
context_page_description: The Rio Tinto Boron Mine in Boron, California is California's largest open-pit mine and the largest borax mine in the world, producing nearly half the world's borates. Ore reserves are sufficient for production through at least 2050. It is operated by the Borax division of the Rio Tinto Group.
context_section_description: The Rio Tinto Boron Mine (formerly  the U.S. Borax Boron Mine)  in Boron, California is California's largest open-pit mine and the largest borax mine in the world, producing nearly half the world's borates.  Ore reserves are sufficient for production through at least 2050. It is operated by the Borax division of the Rio Tinto Group.
caption: Rio Tinto Borax mine from ISS, 2013
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