Shenzhen Baitai Jewelry Co., Ltd. is a large-scale gold jewelry processing manufacturer and brand operator integrating jewelry research and development, production and processing, product wholesale and brand operation.
Gold is a rarer, more precious and more valuable metal.
Generally speaking, the gold in the world is in ounces. In ancient China, gold was measured in ounces, which was a very important metal.
It is not only a special currency for reserve and investment, but also an important material for jewelry industry, electronics industry, modern communication and aerospace industry.
Extended data:
The color of gold is golden yellow, which has a metallic texture and is not easy to decompose. Hardness 2-3, pure gold 19.3, melting point 1064.4℃.
Good ductility, can be pressed into thin foil, and has extremely high heat and thermal conductivity. The resistance of pure gold is 2.4p Pure gold has good chemical resistance and is the best electroplating material.
As a precious metal, gold has good physical properties. "Real gold is not afraid of fire" means that gold has high chemical stability and is not easy to react with other substances, so there is no need to worry about oxidation and discoloration.
Even in the molten state, it will not be oxidized and discolored, and it will still be golden yellow after cooling. High density and heavy touch. Good toughness and ductility, good electrical conductivity.
Pure gold is bright yellow, but the color changes greatly after mixing with other metals, such as gold-copper alloy is dark red, and silver-containing alloy is light yellow or grayish white.
Gold is easily ground into powder, which is also the reason why gold is dispersed in nature. Pure gold jewelry is also easy to wear and lose weight.
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Baidu encyclopedia-Shenzhen baitai jewelry co., ltd.