What do you think of developing electrochemistry to e.g. recover silicon, magnesium, and iron from the very common olivine? Yeah, the other two aren't used much

What do you think of developing electrochemistry to e.g. recover silicon, magnesium, and iron from the very common olivine? Yeah, the other two aren't used much today, but they seem to be superior in specific strength to steel, and mostly not used because they're expensive today (and because silicon is brittle). Similarly, sea salt has many elements of interest; there's a lot of sodium but afterwards a good variety. Desalination plants already concentrate these up.