925 Sterling Silver and CZ Birthstone Kids Necklace with 3 Children. Both the chain and the charms are sterling silver. The head of the birthstone child has a clear CZ stone and the body has a colored CZ stone to match the birth month, with tiny silver beaded arms and legs. The legs are movable but the arms are not. The birthstones are January(Garnet), September (Sapphire Dark Blue), and April (Diamond- Crystal Clear).