Pure gold 999 has a high purity of 99.9%, while the purity of ordinary pure gold is slightly lower. This means that pure gold 999 is softer, more malleable and more plastic, so it is often used to make exquisite jewelry. In addition, because the purity of pure gold 999 is close to pure gold, its value is relatively high. However, due to its low hardness, it is easy to wear and deform, and needs more detailed maintenance.

In the market, the prices of pure gold and pure gold 999 are also different. Generally speaking, the price of pure gold 999 is higher than that of ordinary pure gold, because its manufacturing process is more complicated and its technical requirements are higher. At the same time, there are relatively few channels to buy and recycle pure gold 999, so it is necessary to find a professional jeweler or recycling agency.

Gold identification method

1. Observe the color: real gold should be bright golden yellow with unique color. If there are other impurities, the color of gold may change. Therefore, by observing the color of gold, we can preliminarily judge the authenticity of gold.

2. Test density: The density of gold is relatively high, about 19.3g/cm3. By measuring the density of gold, we can identify whether it is real gold or not.

3. Use chemical reagents: real gold will not react with most common chemicals, and chemical reagents such as nitric acid and hydrochloric acid can be used for identification. If gold reacts with these reagents, it may be other metals.

4. Check magnetism: Gold is a nonmagnetic metal and will not be magnetized under the action of magnetic force. By using magnetometer to detect, the authenticity of gold can be identified.