The earliest natural pearl was made from the fossils of conch. Later, due to the scarcity of fossils, the ancient Tibetans began to wear a kind of sedimentary rock containing jade and agate elements, which had a very strong magnetic field and a natural pattern, mainly with eyeballs, with triangles and quadrangles. . The finished product highlights the makeup of the eyeball, which is an immeasurable Buddhist holy thing - Tianzhu. Later, because of the scarcity of nine eyed stone shales, the ancient people of Tibet began to imitate the patterns of sedimentary rocks by using herbal collocation colors to artificially draw beads on agate, and then burned at high temperatures.