Seems there's a lot of noise about the impact two mines in NC could have on silicon chip manufacturing
But as far as I can tell there are other mines / quarries producing quartzite for chips e.g. https://www.elkem.com/about-elkem/worldwide-presence/norway/elkem-tana/
And to save you following me down the rabbit hole here's the process for the conversion to silicon used in chips https://magazine.elkem.com/material-science-insights/from-quartz-to-silicon-to-silicones/#:~:text=Metallurgical%2Dgrade%20silicon%20is%20produced,a%20submerged%20electric%20arc%20furnace.
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