Depends on the necklace material, but in general, usually have to clean the necklace first, cleaning needs to use soft cleaning agent cleaning, cleaning to dry, and avoid dust. After cleaning, put in the original necklace box, if no original box should be placed in a sealed container and fixed to the fixed Necklace necklace can function in a closed container inside some soft foam cloth, the inside of the box should put some dry agent to prevent corrosion and mildew damp necklace.