- The Gem Drop Shop is a one-of-a-kind jewelry and crystal shop located in the heart of historic Black Mountain. Owned by husband/wife team Johnny and Erin Walker, the Gem Drop has something for every jewelry and rock lover in the family. In addition to handmade jewelry rocks, crystals and other gifts, customers may choose from over 45 gemstones and design their own piece which can be made while you wait! Browse our one of a kind gallery selection featuring many rare and unusual gems collected from around the world and created right here in our studio. We also offer permanent jewelry...choose from over 25 chains and have them welded in our beautiful studio. Interested in silversmithing? Sign up for one-on-one or partners classes personalized just for you! Our classes are perfect for beginners and teens.