I worked in a jewelry store for a while. The cost price of gold generally refers to the purchase price of the terminal retailer. At present, the basic gold price is about one gram in 390 yuan, but I personally think that the purchase price of terminal retailers should not be calculated according to the international basic gold price. Only terminal retailers know that gold jewelry is different from pure gold. The international basic gold price generally refers to pure gold, so there is a price difference of 60-80 yuan per gram between them. You can go to the jewelry store or the bank to find out the price of investing in gold bars and gold jewelry.