Platinum (Pt for short) platinum alloy contains 95% pure platinum, and 18K gold contains 75% gold. The purity of a platinum jewelry is higher than that of gold jewelry. 2. The rarest
The world produces platinum 140 tons every year, while the annual output of gold is 3300 tons. The international symbol of Platinum is the words Pt, Plat or Platinum, which are expressed by thousands of pure numbers. For example, the purity of Pt900 is 900% O, and the specifications of platinum ornaments are Pt 1000, Pt950, Pt900 and Pt850.
Purity is expressed as the lowest value without negative tolerance. The table shows the purity range of platinum. The content of platinum in platinum alloy jewelry shall conform to the provisions in the table below, and the total content of platinum and palladium shall not be less than 950‰.
The difference between platinum and k gold
Platinum: It is a natural white precious metal. 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".
White gold: Gold appears white after adding some alloys. 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
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.