What is the feature of platinum(pt)?

In fact, simply an element of platinum, platinum is a mixture. Platinum: the Platinum (pt), chemical properties of gold is more stable than the price than all gold, were used to make high-end jewelry. Jewelers see on the product "pt900" or "pt950" represents the content of platinum in jewelry were 90% and 95%. Pure platinum jewelry in general purity of 95%, while the purity of 18k gold is only 75%. Any metal that can completely clean, there are impurities, mixed with other metals. Platinum is almost free of impurities, high purity, it will not fade or change color, can remain in the passage of time the luster. Pure white luster of platinum is well reflected the true radiance of diamonds. Rare rare than gold, platinum 35 times in the world, only in very few places to mining, mainly in South Africa and Russia, and Zimbabwe, Canada, South America, a few areas. Each year, only 88 tons were manufactured platinum jewelry, and gold is 2,700 tonnes. Fewer platinum gold, and gold ore ratio of 1 to 10. The density and eternal weight of platinum than other jewelry to make it more durable metal. Will leave scratches all precious metals, platinum is no exception. However, the scratch on platinum is just moving the metal, will not reduce its volume, and will bring the gold scratches on the wear and reduce the volume of gold. If indeed there platinum visible scratches, qualified jeweler can re-polish it. Platinum: A containing gold (au) and a mixture of small amounts of other metals. Visible on the market the highest purity of platinum is 75%. 75% from 25% gold and silver, nickel, copper and other metal mixture, that is, k white gold. Mark the 18k white gold, 750 platinum, 750g, etc. How to identify platinum platinum and white gold and platinum k gold jewelry is mainly to see the difference between the marks on which the logo in the inner ring, and necklace is marked on the hasp Department. Platinum 990 ‰ or more platinum jewelry color, usually playing a "full platinum" mark. And "p950" mark means that a platinum fineness 950 ‰. Kk k white gold to mark the number. k refers to the gold content, such as marked 18k white, 750g, 750 gold, au750 are the words that the content of 18k white gold k gold. The purity of platinum jewelry do not "k" said. K on the market of white gold, k gold jewelry are not platinum jewelry.