Diamonds: It is the hardest substance found in nature by humans so far. But hard things are fragile, so you should avoid wearing diamond jewelry when doing physical labor or strenuous exercise.

Platinum: Avoid hooking, pulling, dragging and pressing when wearing, especially the mechanical hard body chain. It is not suitable to wear gold jewelry at the same time. Because gold is soft, if it rubs against each other, it will not only damage the gold jewelry, but also dye gold on platinum

Jadeite: hard but brittle, easy to crack or break due to external force, and avoid collision or fall due to external force when wearing

Pearl: If it is not properly maintained, it will lose its charming luster. If it is not worn, it should be rinsed with pure water and stored in a soft silk bag

Caibao: Ruby and sapphire are resistant to strong acids and alkalis, and their hardness is second only to diamonds. They should also be avoided when exercising or doing housework, so as not to damage or fall off the gemstones.

Gold: Pure gold jewelry is easy to have chemical changes with mercury, lead and other metals, causing white spots on pure gold jewelry, but it can recover its original color after burning.

Precious metals: Avoid wearing in rough and miscellaneous environment or contacting with acid and alkali environment, so as to avoid the corrosion and fading of the electric metal layer on the surface.