Tianzhu, called Tianshi in ancient times. A natural jewelry produced in Tibet is made of sedimentary rocks containing jade, agate and crystal minerals. It is the first of the seven treasures in people in Xizang. Tibetans believe that dzi beads are supernatural products created by God, which are naturally generated or descended from the sky.

In fact, the earliest natural dzi beads were polished by conch fossils. Later, due to the scarcity of fossils, ancient Tibetans began to polish dzi beads with a sedimentary rock containing jade and agate. This sedimentary rock has a strong underground magnetic field, which can naturally form regular patterns such as eyeballs, triangles, quadrangles and lines. Among them, the nine-eye stone is the most scarce. However, this ancient processing method has long been lost. This also proves that wearing ancient dzi beads does have a certain effect on eliminating diseases.