Stefany likely know what kind of nut or fruit pit.
These were also popular in Deco-era fashion jewelry, and are still being made today.
https://en.wikipedia.org/wiki/Eight_Immortals
Hang Xiangzi is the one with the flute.
thanks - its one of my favourite pictures from my recent book, page 51. some of them are well-carved and probably early 1900s...