There are two kinds of transactions in China's legal gold market, namely spot trading and futures trading. Spot gold mainly refers to gold bricks, gold ingots, gold bars and gold coins. The purchase of gold and silver shall be handled by the People's Bank of China. No unit or individual may purchase gold and silver except with the permission or entrustment of the People's Bank of China.
Methods to identify adulteration of gold;
1. Whether the gold has white highlights, cut the gold bars or gold jewelry with scissors, and observe the section with a magnifying glass. If you see white bright spots, it means that gold is doped with iridium, because gold and iridium can't blend together;
2. Measure the specific gravity. First, measure the weight of a pure gold bar with a balance, then put the gold bar into a measuring cup and pour water to drown it. Then put the detected gold bars into a measuring cup and observe whether the scale of water rises or falls. As long as there is a change, it means that gold bars are not pure gold. But if it is gold jewelry, this method is not applicable, because there is air in the gold jewelry;
Real gold is not afraid of fire. Put gold bars or gold jewelry on the fire for a period of time and observe its changes. Because iridium will combine with oxygen in the air to produce oxidation reaction, gold bars with insufficient purity will turn gray, while pure gold will appear red and shiny after baking. However, this method may have some damage to jewelry.
Methods of cleaning gold:
1, to protect the luster of gold jewelry, you can coat it with a thin layer of nail polish;
2. Ring with gemstones Roll a piece of cotton with popsicle or matchstick, then soak it in the mixed solution of toilet water and glycerin and scrub the gemstone and its frame. Then polish the ring with flannel to avoid scratching with sharp objects such as blades;
3, salt and vinegar are mixed into a cleaning agent, and it can be used to wipe pure gold jewelry, which can make it last forever;
4, toothpaste wiping or scrubbing with hot rice soup can also restore luster;
5, available ammonia scrubbing.
Article 225 of the Criminal Law of People's Republic of China (PRC), in violation of state regulations, commits one of the following illegal business operations, disrupting market order, and if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall also, or shall only, be fined not less than one time but not more than five times the illegal income; If the circumstances are especially serious, he shall be sentenced to fixed-term imprisonment of not less than five years, and shall also be fined not less than one time but not more than five times for illegal gains or confiscation of property:
(a) operating a franchise or monopoly commodity or other commodities whose operation is restricted by laws and administrative regulations without permission;
(2) buying and selling import and export licenses, import and export certificates of origin and other business licenses or approval documents stipulated by laws and administrative regulations;
(three) without the approval of the relevant competent departments of the state, illegally engaged in securities, futures, insurance business, or illegally engaged in fund payment and settlement business;
(four) other illegal business activities that seriously disrupt the market order.