Crystal belongs to the white mercury star among the nine stars, which can promote wealth, promote wealth and purify the environment. In particular, crystal towers are often used in Feng Shui. Crystal balls are something that the West likes to use. People abroad think they have magic, and they have been combined with us, so they are more common in daily life. In Feng Shui, white is a lucky star, so crystals are often used to promote good luck.