Talc!
Talc is a clay mineral found in makeup. This is my favorite eye shadow (its all beat up because it stays in my purse wherever I go). Its got a ton of other ingredients too, but the very first one is talc. Talc can be made into very fine powder that absorbs moisture. Another example of where you might see it is in baby powder.
There are talc mines in Idaho, actually, in Valley County. You can read more about those deposits on this website, or other states known for their talc mines. Or just see the picture below.
https://thediggings.com/usa/idaho/valley-id085
https://pubs.usgs.gov/of/1995/0586/report.pdf
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| https://excipientworld.org/wp-content/uploads/2018/11/Talc_mined-1200x900.jpg |
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