How to distinguish platinum and silver jewelry

Platinum's exquisite color and the most extensible characteristics have become the main material for making jewelry. It is precious and rare, does not fade and oxidize, and is stable in quality. The color of silver and platinum is very close, and the appearance is very easy to be confused. A brief introduction of how to distinguish platinum and silver jewelry. Platinum's exquisite color and the most extensible characteristics make it the main material for making jewelry. It is expensive and rare, never fades and oxidizes, and has stable properties. Because the colors of silver and platinum are very close, it is easy to confuse it from the outside. The following briefly introduces how to distinguish platinum and silver jewelry. (1) Identification of seals: Jewelry products must be marked with seals and their purity in accordance with national standards. If the jewelry has the words'pt' or'platnum' or'plat', it is platinum, and if the jewelry has the words's' or'silver', it is silver. (2) Weighing: Platinum has a specific gravity of 21.4 and silver has a specific gravity of 10.49. The same volume of platinum is twice as heavy as silver. Generally, the two can be distinguished by weighing it by hand. (3) Comparison of appearance and hardness: Platinum will be slightly grayish bright white with the naked eye, and the texture is hard. It is more difficult to scratch with a pin. Its Mohs hardness is 4.3, while the color of silver is white and smooth. It is delicate, and will turn into off-white or jet black upon light oxidation. Its Mohs hardness is 2.7, which is much softer than platinum. (4) Firing method: Platinum can resist high temperature oxidation, and its melting point is as high as 1770oc. It will not melt when it is fired at high temperature (gasoline). After cooling, the color will not change or there will be traces of quenching. Silver has a low melting point. After being burned at a high temperature, its color is red, black, red or jet black depending on the amount of silver. (5) Chemical method: Platinum has extremely stable chemical properties and is corrosion resistant. It will not react with any acid or alkali, while silver is not resistant to strong acid corrosion. Previous: Commonly used identification methods for platinum Next: Don't let platinum pretend to be platinum