Ok sure, but that's far from the primary concern here. I'm thinking of things like this: https://tamararubin.com/2021/09/yellow-vintage-fiesta-plate-made-in-us

Ok sure, but that's far from the primary concern here. I'm thinking of things like this: https://tamararubin.com/2021/09/yellow-vintage-fiesta-plate-made-in-usa-563800-ppm-lead-90-ppm-up-is-unsafe-in-modern-items-made-for-kids/ https://tamararubin.com/2021/09/yellow-vintage-fiesta-plate-... ..which is mad of approximately 50% lead, and certainly no accident of nature. And even if it were to occur naturally, that wouldn't make it any less hazardous.