Identifying high-quality or natural pearls requires specialized gemological testing, which many local shops aren't equipped to do.
Pearls are soft and susceptible to damage from perfume, hairspray, or skin oils, making them harder to resell than durable gemstones. Where You Can Sell Them do jewelry stores buy pearls
Jewelers often buy old jewelry for the "scrap" value of the precious metals. If your pearl necklace has a 14k gold clasp, a jeweler might offer cash just for that metal, but nothing for the pearls themselves. or skin oils
Designer pieces from Mikimoto, Tiffany & Co., or Cartier are much easier to resell. Tiffany & Co.