This 5-loop mini pebble necklace is available in two versions, one on silver chain and the other on gold chain. The chain length on this necklace is adjustableand can be worn at 18.0″ length to 20.0″ in length. Materials: 14k gold-fill (14k gold over brass core/no nickel) and sterling silver (.925). All materials are hypoallergenic. This necklace was designed in San Francisco and is handmade in our Upstate New York production studio.