About 400 grams, one 20 grams, four 80 grams. If the most important thing for you to buy jewelry is to preserve the value, and then to look good, then pure gold is more suitable for you. Because most gold is sold by the gram, as long as you know the price of gold, you can buy it at the lowest price. This kind of selling by the gram will be more valuable. 18K gold is sold at a price, which will be a little more expensive, because the production process of 18K gold is different, and some of them will be inlaid with some precious stones. 18K gold will lose money if it is sold by the gram, so most of it is sold at the same price.