Imagine all the designer gastroliths. Gucci rocks in your stomach. All the snake oil ones that “cleanse”, “detox”, or have positive ionic charges or something. Someone surely would suggest plastic, or those would be the cheap ones at gas stations. At some point, we would have had people shilling asbestos or uranium gastroliths as good for you. Someone else would pick rocks up along stream beds and sell them as “organic”, nevermind the parasites or other possible diseases attached to them. Someone would push bullshit medical rocks instead of vaccines as cures for diseases.

Lol, people would make a mess of plain old rocks.