Xi An's jade is lantian jade. As one of the four famous jade in China, lantian jade has a long history and rich cultural connotation. This kind of jade is named after Lantian Mountain in Xi City, Shaanxi Province, and has been called "Jade Species Lantian" since ancient times. The development and utilization of lantian jade can be traced back to the Neolithic Age, and it is one of the earliest jade species in China, with a history of more than 4,000 years. Its main internal components are serpentine and calcite, belonging to a serpentine diopside. Lantian jade is mainly composed of fine marble, with calcite as the main mineral component and sphalerite as the secondary mineral component. This kind of jade has various colors, mainly white, but also yellow, beige, light green to green and so on. Lantian jade is delicate and clean in texture, and has good processability. It is often used to make various exquisite handicrafts, such as tea sets, wine sets, jade pillows, jade bracelets and fitness balls.