1. Seal identification: Jewelry products should be marked with seals and their purity according to national standards. If there are words "PT" or "platnum" or "platat" on the jewelry, it is platinum; if there are words "S" or "silver" on the jewelry, it is silver.

2. Weighing: platinum ratio is 2 1:4, and silver ratio is 10:49. Platinum with the same volume weighs twice as much as silver. Generally, the two can be distinguished by manual weighing.

Third, the comparison of appearance and hardness: Platinum will be slightly gray and bright white to the naked eye, and it is hard to carve scars with pins. Its Mohs hardness is 4.3, while silver is white, smooth and delicate, and will turn gray or black after oxidation. Its Mohs hardness is 2.7, which is much softer than platinum.

Pyrolysis: Platinum can resist high-temperature oxidation, and its melting point can reach 1770℃. It will not melt with ordinary high-temperature (gasoline) fire, and its cooling color will remain unchanged or there are quenching marks. On the other hand, the melting point of silver is very low. After high temperature fire, according to the amount of silver, its color is red, black or black.

5. Chemical method: Platinum is extremely stable in chemical properties and corrosion-resistant. Under any acidic conditions, alkali will not reflect, while silver is not resistant to strong acid corrosion.

Baidu Encyclopedia-Platinum

Baidu encyclopedia-silver jewelry