In modern society, the main uses of gold are:

1). Used as international reserves. This is determined by the monetary commodity properties of gold. Due to the excellent properties of gold, gold has historically served as a currency, such as a measure of value, a means of circulation, a means of storage, a means of payment and a world currency.

2). Used as jewelry decoration. Gorgeous gold jewelry has always been a symbol of a person's social status and wealth.

3). Application in industry and science and technology. Due to the unique good properties of metal, it has extremely high corrosion resistance and stability; good electrical and thermal conductivity.

The chemical symbol of gold is Au, and its financial English code is XAU or GOLD. The name Au comes from a story about Aurora, the goddess of dawn in Roman mythology, which means shining dawn.

International gold prices surged sharply after entering 2015. The price of gold in the New York market rose from US$1,200 per ounce to US$1,300 in less than a month; statistics show that the price of gold futures in the New York market has A cumulative increase of 9.3%. Extended information

Physical properties

1. Color:

The steam emitted when gold is melted is green; its gold powder during the smelting process is usually brown color; if it is cast into a thin piece, it can transmit green light.

2. Extensibility:

Exceptionally strong. One ounce of gold can be stretched up to 50 miles long, and its malleability makes it easy to cast, making it a good choice for jewelry. Gold has the strongest pulling power among all metals.

3. Malleability:

Second to none. Can produce extremely thin gold sheets that are easy to roll. An ounce of gold can be hammered down to a thickness of 1/4 million and an area of ??100 square meters. Ancient people hammered it into thin sheets and used it to decorate temples and palaces. All these can illustrate the extremely strong flexibility and malleability of gold.

The color of gold is golden yellow, with metallic luster, and it is difficult to decompose. Hardness 2-3, pure gold 19.3, melting point 1064.4°C; has good ductility, can be pressed into thin foil, has extremely high heat transfer and electrical conductivity, and the resistance of pure gold is 2.4p. Pure gold has good resistance to chemical corrosion and is the best electroplating material.

Baidu Encyclopedia-Gold