In the Stone Age, pendants with potent symbolism were made from animal teeth and bones, adorning clothes or accessories and serving as rattles. Human bones were also used as a raw material for pendants, as demonstrated by a study where burial finds dating back more than 8,200 years were re-examined after 80 years.
source https://www.lifetechnology.com/blogs/life-technology-science-news/human-bones-used-for-making-pendants-in-the-stone-age