Examples are Searles Valley Minerals which extracts boron from the brine under Searles Lake, CA [1] and Rio Tinto's lithium extraction plant which uses waste ro

Examples are Searles Valley Minerals which extracts boron from the brine under Searles Lake, CA [1] and Rio Tinto's lithium extraction plant which uses waste rock from the Borox mines in Boron, CA [2]. It takes time to spin up production to 10 million tons per year - which is the scale of boron or silicon production according to the wiki - but now that lithium is worth something, it's just a matter of time and incentives. [1] http://www.svminerals.com http://www.svminerals.com [2] https://www.riotinto.com/en/news/releases/2021/Rio-Tinto-achieves-battery-grade-lithium-production-at-Boron-plant https://www.riotinto.com/en/news/releases/2021/Rio-Tinto-ach...