They're often passed down as heirlooms and keepsakes, so keeping pearls clean and preserved can yield generations-long ...

And it’s this organic origin of pearls that makes them so unique and also so delicate. The Need For Cleaning: Preserving ...

Pearls should never be cleaned in an ultrasonic or steam cleaner. It’s safe to use warm, soapy water for occasional, thorough cleaning. If the pearls are strung, be sure the string is completely dry ...