The growth process of natural crystal is extremely complicated. During the formation process, it is often affected by the environment. There are always some impurities in the crystal. When looking at the sun or under the light, you can see faint, uniform and small horizontal stripes or catkin-like shapes. substance. The imitation natural crystals are mostly smelted with inferior crystal slag and glass slag, processed and polished, colored and imitated. The crystals are often accompanied by bubbles, without uniform stripes and catkin-like substances.