The difference between platinum and similar metals

If you are not very familiar with platinum, you will not be able to tell whether you have bought genuine platinum when you buy it. Nowadays, there is a lot of fish in the market. In order to prevent buying fakes, everyone will follow the author to understand the difference between platinum and similar metals. . If you are not very familiar with platinum, you will be confused when you buy it whether you have bought genuine platinum. Nowadays, there is a lot of fish in the market. In order to prevent buying fakes, everyone will follow the author to learn about platinum and similar metals. the difference. Pure platinum: the platinum content per thousand is not less than 990, mark'full platinum' or'pt990' to indicate that the percentage of platinum in the jewelry is 99%. Platinum 950: The platinum content per thousand is not less than 950, and it is marked with'Platinum 950' or'pt950' to indicate that the percentage of platinum in the jewelry is 95%. Platinum 900: Platinum content per thousand is not less than 900, marked with'Platinum 900' or'pt900', indicating that the percentage of platinum in the jewelry is 90%. Platinum is a good catalyst. Using this feature, platinum can be quickly identified. Commonly used hydrogen peroxide reaction method, the specific method is: take a small amount of powder to be tested and place it in a plastic bottle containing hydrogen peroxide (h2o2). , Can also be recycled. What is the difference between platinum and similar metals? Although silver is silvery white, its relative density is 10.53, which is only 1/2 of platinum; and it is low in hardness and inelastic, so it can leave traces by scratching lightly with a fingernail. The foil is also easy to fold when light by hand, and it is difficult. For recovery; plus the chemical properties of silver are unstable, it will dissolve in contact with nitric acid and release nitrogen dioxide gas. Platinum is insoluble in nitric acid and can dissolve quickly in heated aqua regia. Its dissolution rate is extremely slow at room temperature, and it is generally difficult to detect with the naked eye. What is the difference between platinum and similar metals? After pure platinum jewelry is heated or fired to cool, its color will not change. After the silver is burned, its surface will show a moisturizing or black-red hue. Pure platinum is easy to bend and break straight to restore; lower color is hard and brittle, and it is difficult to bend. Previous: 10 points diamond ring prices are not the same Next: How to judge the quality of platinum diamond pendants