18k gold is valuable. The purity of 18k gold is not high. After all, it only contains 75% gold, which is very low compared with gold. However, the value of 18k gold cannot be measured by purity, because its value is not measured by purity. 18K gold is exquisite and gorgeous in workmanship and modeling, which is incomparable to gold. The preservation of gold is due to raw materials, and the preservation of 18K gold is the overall artistic value of jewelry. -Quoted from the Internet

18K platinum is a relative price, mainly depending on which substance it is compared with. Compared with pure gold, the price of 18K platinum is lower, but compared with other general decorations, the price is still higher, although it is not 100% gold. Gold doped with 75% is relatively high, which has certain collection value and appreciation space. Moreover, the main function of 18KK platinum is to set diamonds. Even though it is worthless, it has brought 18K platinum to a very high price with the help of diamonds.

This truth is easy to understand. When a piece of paper is separated from a crab, the price of a piece of paper is much lower than that of a crab, but if the crab is wrapped with this paper, the price of this paper will be doubled. With the rising price of diamonds, the price of 18KK platinum is also rising.

In jewelry stores, there is almost no diamond inlaid metal with 24K pure gold, so there is no need to set diamonds at such a high cost. Basically, 18KK platinum is used, so 18K is widely used in jewelry industry, and 18K gold is more expensive in shape, workmanship and brand.