1. listen: with the finger shot, the sound of the ordinary glassware is a muffled "snap" sound, and the crystal utensils are more crisp, the sound of "Dangdang" with metal sound, the higher the hardness of the crystal, the louder the sound. 2. luster: in the sun light comparison, high quality crystal refraction of the colorful light colorful, and the transition light is very natural and rich, glass refraction is often incomplete and bleak color. Its transparency is compared to natural light, high quality crystal transparency is high, showing glittering and translucent white, while ordinary glass or pure crystal will be yellow or mixed with green color. 3. pattern: for the same crystal, the higher the degree of handwork refinement, the more meticulous and complex the pattern is, and the higher the value. With hand touching, the surface of hand-made pattern has a sense of rough grip, and the surface of the mechanism pattern is smooth. 4. use: because the crystal hardness is far higher than the ordinary glass, long term use is often not dirty, and glass used for a long time, it is easy to have scratches and surface pollution. After discerning clearly, all you have to do is to check the integrity of the product, whether the appearance is defective or not, and whether the surface is smooth and meticulous.