Second, gold jewelry is prone to chemical changes with silverware, mercury, lead and other metals, making gold jewelry appear white spots. Try to avoid contact with these metals when wearing and storing.
Three, gold jewelry should be avoided together with other jewelry, especially diamonds, because of different hardness will cause mutual friction and scratches, should be stored separately in the jewelry box.
Fourth, pay attention to the method of cleaning gold ornaments. Gold jewelry can be washed with diluted soap solution, and then dried with a soft cloth.
Five, silver jewelry with enough silver, S925 silver is more, in the process of wearing and collecting, there will be chemical effects such as oxidation, which will turn yellow and black. This is a normal phenomenon, because silver jewelry is in contact with harmful gases such as oxygen and sulfur dioxide in the air; Contact with human sweat; This phenomenon will appear when it comes into contact with acidic chemicals and can be recovered after cleaning. Silver-plated white jewelry is S925 silver plated with a layer of precious metals (such as nickel, rhodium, etc. ) according to the process requirements. In the process of wearing, if you accidentally rub, scratch or contact with strong acidic chemicals, it will fall off, change color and turn black. It is difficult to recover after the surface is plated white, so be careful to wear and maintain it.
The discoloration or fading of gold jewelry is closely related to human sweating. 99% of human sweat is water, and about 1% is waste and harmful substances in human body. This chemical salt often falls from gold jewelry, polluting the wearer's skin and leaving obvious black stains on the skin.