Klerksdorp Spheres mystery, South Africa

The Klerksdorp Spheres are small, often spherical to disc-shaped, objects, which have been collected by miners and rockhounds from 3.0 billion year old pyrophyllite deposits mined by Wonderstone Ltd., near Ottosdal, South Africa. These objects have been cited by alternative researchers and reporters in books, i.e Cremo and Thompson (1996, 1999); popular articles, i.e. Barritt (1982), Jimison (1982), and Jochmans (1995); and innumerable web pages, i.e. Barton (nd) and Psybertronist (nd) as purportedly anomalous "out-of-place artifacts" that could only have been manufactured by intelligent beings. Conventional geologists, i.e. Cairncross (1988) and Heinrich (1997, 2007), who have personally studied these objects, have argued that these objects are not manufactured, but the result of natural processes.-Wikipedia-