An update to this story, a California woman who brought home a handful of greenish rocks her children found on the beach had a very painful surprise when the rocks caught fire in her pocket. She suffered second and third degree burns due to the flaming stones. Her husband suffered similar injuries while attempting to help her.
Lab reports indicate that the rocks contained “elevated” phosphate levels, most likely contamination from a man-made source. San Clemente Island, just miles off the coast where the woman’s children found the rocks, is owned by the military. They’ve denied any responsibility for the pollution and injuries, and for now the investigation continues.