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.
If you have high-quality or rare pearls, you have several specialized options: do jewelry stores buy pearls
Identifying high-quality or natural pearls requires specialized gemological testing, which many local shops aren't equipped to do. Jewelers often buy old jewelry for the "scrap"
Designer pieces from Mikimoto, Tiffany & Co., or Cartier are much easier to resell. Tiffany & Co.
While quick for cash, shops like Pawn America or The Castle Jewelry and Pawn will likely offer the lowest percentage of the original value. What Makes a Pearl Valuable?