Scientists have recovered the DNA of a woman from the tooth, which was used as a pendant 19,000 to 25,000 years ago.
The pristine collection of the pendant from Denisova Cave paid dividends.
The researchers who found the pendant, which was determined to be 19,000-25,000 years old, used gloves and face masks when excavating and handling it, avoiding contamination with modern DNA.
The oldest-known objects used as personal adornments date to about 100,000 years ago from Africa, according to the University of Leiden's Marie Soressi, the study's senior archeologist.
Denisova Cave long ago was inhabited at different times by the extinct human species called Denisovans, Neanderthals and our species.