The density of gold is 19.3g/cm3. Gold is a simple form of chemical element gold. It is a soft, golden yellow and corrosion-resistant precious metal. Gold is one of the rarer, more precious and highly valued metals. Gold has good ductility, can be pressed into thin foil, and has high heat transfer and conductivity. Gold generally takes ounces as the unit of gold in the world. In ancient China, 'Liang' was used as the unit of gold. It is a very important metal.
Gold is not only a special currency for reserve and investment, but also an important material for jewelry industry, electronics industry, modern communication, aerospace industry and other departments.
As a precious metal, gold has good physical properties. 'real gold is not afraid of fire' means that gold has high chemical stability, is not easy to react with other substances, and there is no need to worry about oxidation and discoloration. （HuangJinDeMiDuShiDuoShao）