1, beautiful, that is, gorgeous, glittering and translucent.

This kind of beauty is either colorful, transparent and clean, or has special optical effects (such as cat's eye, discoloration, luminescence and so on). ), or have special patterns (such as chrysanthemum stone, agate, plum blossom jade, etc. For example, diamonds with few defects can be polished into precious diamonds, while those with poor transparency, many defects and black color can only be used as industrial raw materials.

2, long, that is, the texture is hard and wear-resistant, and it can last for a long time.

Because of its high value, people must expect it to be durable, valuable and even heritable.

3, thin, that is, less output.