This criterion is essential. It points out how human norms and conventions vary in the ritualised behaviours present in nonhuman primates. Various beads produced from Nassarius gibbosulus shells are considered the earliest recognised kinds of private adornment, or simply jewelry. Two shell beads found in Skhul Cave about the slopes https://arthurutrok.blogdal.com/31480894/about-nassarius-shell-beads