Caused by turbidity of beads. Sugar balls belong to four categories of high-grade ancient beads in Tibet. Because the beads are turbid, the lamp cannot penetrate. Cizancourt pearls refer to various types and materials of jewelry handed down from Tibet, ranging in age from hundreds to thousands of years. We often come into contact with old corals, old beeswax, old dragonflies, old turquoise, Tang Qiu, old pharmacists, old silk and so on.