All pearls are cleaned in a tumbler with warm soapy water and a little salt as a gentle abrasive agent. This process removes sediment, odor and brings the luster to the surface. This practice is completely acceptable and will not damage the pearls.

Some pearls are tumbled longer to remove surface nicks, enhance shape and improve luster in lower quality pearls. Although not deceptive, it could wear down the nacre.

Beeswax is also occasionally added to enhance luster. Bear in mind however that this treatment is not permanent.

Tumbling in chemical adds luster that lasts longer than the beeswax treatment, but it again is not permanent, and the chemicals can eat nacre.