Glass crystals are usually made of high-purity silicon dioxide (SiO2 _ 2) and other additives through special processing and treatment. Compared with rock crystals, the chemical composition and structure of glass crystals are not exactly the same. Its appearance and performance can be adjusted by controlling temperature, pressure and the type and proportion of additives. Glass crystal has transparency and optical effect similar to rock crystal, and can be used in jewelry, decorations, ornaments and other fields. Although glass crystal does not have the unique energy and spirituality of rock crystal, it can imitate the beauty of rock crystal in appearance and its price is relatively low, so it has been widely used in the market.