Shashi jewelry store. The main business of Shashi Jewelry Store is the synthesis and sales of imitation diamonds, and it can be returned for seven days without reason. Mosan diamond is an imitation diamond, which belongs to a kind of synthetic gem. Natural Mosang diamonds rarely exist in craters, and there are many impurities and defects. Most of them are dark green and black in color, so they can only be used for scientific research. In the jewelry store in Shashi, Jingzhou, Mosang diamonds are all cultivated in the laboratory. In terms of chemical composition, diamonds are similar to Mosan diamonds.