Necklaces / Pendants by Grace Girvan Pebbles will vary in each pendant. Pebbles no larger than 4cm long. Features Primary Material : silver Other Materials : pebble and wood Length (inches) : 24 One of a Kind : Yes Metal : silver Hallmarked : No Cleaning InstructionsA silver cleaner such as silver dip or foam can be used if you are very careful not to get the solution on the wood, pebble or oxidised link. A silver cloth can be used otherwise.