Those grooved metal spheres from South Africa — I actually emailed a geologist

You see them in every 'they lied to you' video: the Klerksdorp spheres, little metallic balls with three perfect grooves around the equator, dug out of pyrophyllite near Ottosdal (people say Klerksdorp, it's that district), North West Province, South Africa. And the kicker everyone screams: the rock……