Pearls are more delicate than most gem materials, so they require special care.

Store pearls in a soft pouch or separate container to minimize contact with other jewelry. They should not be stored in an airtight container.
 

Clean pearls regularly with a soft, damp cloth or lambskin chamois.
Periodically restring strands of pearls. The silk string should be clean, the knots should be tight, and there should be no slack between the knots and pearls.
 

Remove the pearl jewelry before applying cosmetics, perfumes or hairspray, and before swimming, exercise, housework, and gardening.