2. You can go to gold shops with gold recycling business such as Chow Tai Fook, Luk Fook Gold and China Gold, or you can choose regular pawn shops, professional recycling companies and regular gold and silver processing shops for trading.
Gold is a simple form of chemical element gold (Au), which is a soft, golden yellow and corrosion-resistant precious metal. 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.
The chemical symbol of gold is Au, and the financial English code is XAU or gold. The name Au comes from a story of Aurora, the goddess of dawn in Roman mythology, which means shining dawn.
Four textures
Pure red gold is gold after smelting and purification of raw gold, which is generally high in purity and fine in density, and some of it can be directly used in industrial production.
Common are gold bars, nuggets, ingots, various ornaments, utensils, gold coins, industrial gold wires, sheets and plates.
Because of different uses, the required fineness is different, or because there is no purification equipment, only unpurified gold is melted, or the purity is not enough to form gold with different fineness. It is customary to divide mature gold into pure gold, red gold and colored gold according to its fineness.
Gold with a fairly high purity after purification is called pure gold, and gold generally refers to pure gold with a purity of over 99.6%.
1. Red gold and pure gold have similar meanings, but the standard of red gold varies with time and place. Gold with a purity of 99.6% sold in the international market is called red gold. Domestic red gold is generally between 99.2% and 99.6%.
2. Non-ferrous gold, also known as "secondary gold" and "tidal gold", refers to gold with low fineness. Due to the different contents of other metals, the purity of these gold is as high as 99% and as low as 30%.
According to the classification of other metals, ripe gold can be divided into solid gold, mixed gold and K gold. Clear gold means that gold is only mixed with silver, regardless of its fineness. Clear gold is more common in gold bars, ingots, nuggets and various utensils and gold ornaments.
3. Mixed color gold means that besides silver, gold also contains other metals such as copper, zinc, lead and iron. According to the different types and quantities of metals, it can be divided into small mixed gold, large mixed gold, bronze mixed gold and lead mixed gold.
4. K gold means that silver and copper are mixed in a certain proportion, and the pure gold calculated according to the formula is 24k. Generally speaking, the more silver in K gold, the bluer the color; If the proportion of copper is large, the color is purple.
The percentage represented by the value of k is only an approximation, and it is not required to be very accurate. Traditionally, even k values are used, such as 24K, 22K, 20K, 18K, etc. 18K means that 24 parts of alloy contain 18 parts of gold, which is equivalent to about 75%. Calculation method of K gold: The calculation formula of converted gold content of K gold is: K value ÷24× 100% (that is, K value × 4. 1667%).