Last month I wrote about the Anthropocene Era, a time deep in the future when humans will be revealed by the geological footprint we are leaving today. Apparently a lot of the questions that alien geologists will be puzzling over will have to do with the residue our industrial age leaves behind. Those stones above are the result of excess automobile paint left by the factories that once flourish in Detroit and other sites around the world. Hence, the name Fordite, often also referred to as Detroit or Motor Agate.
See more examples and a brief explanation here. Thanks to Amy for the world wide pointer to this slice of stoney art. And yes, of course, some of those beauties are toxic; I mean Duh!
image by Talyer Jewelry