Jewelry should be loved because it is ornamental and decorative, and beauty is of course the first choice. Only beautiful minerals and rocks will be chosen as jewelry. The beauty of jewelry is usually reflected in its color first. All bright, pleasing to the eye and pure colors are top grade, otherwise, even if other conditions are good, it has nothing to do with jewelry. Beauty also involves many other aspects, such as whether the luster is bright, whether the brightness is dazzling, whether it is crystal clear, whether there is a so-called "fire" phenomenon, whether there are defects that hinder perception, and so on. In addition, if there can be special optical phenomena, such as the so-called cat's eye effect, starlight effect, color change effect, color change effect, moonstone effect, moonstone effect, luminous phenomenon and so on. It will make the gem more magnificent, magical and attractive.