Yellowstone may be beeswax, also called beeswax, and it is one of the ornaments that Tibetan girls often wear.

Specifically, beeswax is a kind of transparent yellow amber, which is usually dripped by resin such as pine trees and buried underground, and naturally formed after millions of years. It has some unique properties, such as generating static electricity when rubbing, and is also considered to have certain curative effect.

However, it should be noted that Yellowstone is not necessarily beeswax, but may also be other yellow gems or minerals. Therefore, if you have any questions about specific items, you'd better consult a professional jeweler for confirmation.