Which is more expensive, platinum or 18K gold?

1, platinum: It is a precious metal that is naturally white. The annual output of platinum is only one twentieth of that of gold, and it takes five months to extract one ounce of platinum from 10 ton platinum ore. Domestic platinum jewelry usually contains 90% pure platinum and is marked with "Pt900".

2. White gold: It is white after adding some alloys to gold. It only contains 75% gold at most. White gold cannot be marked with Pt mark, only gold and its purity can be marked according to its purity. For example, 18K platinum can only be stamped with "18K" and "G750". In the international precious metal market, the price of platinum far exceeds that of gold, which is the highest among all precious metals. In addition, some white jewelry may be made of silver or coated with white metal, which may show its original appearance after a long time. Although platinum is sometimes commonly known as platinum, it should be called "platinum" in a strict sense. Platinum means platinum in English. Therefore, the purity, rarity, durability and natural white luster of platinum are incomparable to platinum.