1. hardness: soft gold has low hardness, soft texture and high purity. Hard gold changes the physical and molecular structure of gold through a special process, thus enhancing its hardness and making it much harder than soft gold. Composition: Hard gold is doped with 0.005% special metal, and soft gold has high gold content and almost no impurities. Production technology: the production technology of hard gold has experienced special processes such as quenching, while soft gold has only experienced smelting, which is an extraction production mode, and the used things are naturally cooled.

2. Use: Hard gold is mostly made into gold jewelry, which is also used for inlaying, while soft gold is made into various gold bars and bricks for people to collect. Hard gold and soft gold are different in hardness, composition, manufacturing technology and application. Hard gold is more suitable for making handicrafts and jewelry, while soft gold is more suitable for gold reserve and investment appreciation.

3. The simple substance of gold (free form), commonly known as gold, is a precious metal, which has been used as currency, preservation and jewelry for many centuries. In nature, gold exists in the form of simple substance in gold nuggets or rocks, underground veins and alluvium. Gold is also one of the currency metals. Gold is solid at room temperature, with high density, softness, brightness and corrosion resistance. It is the metal with the best ductility, second only to platinum.