Sterling Silver Birthstone Sister Cross Pendant Necklace? Design: No matter what happens, you will always be my sister and friend. This sister necklace represents the close relationship and precious emotions between sisters. The special meaning represented by the birthstone will bring good luck to your sister. This is a meaningful gift for your dear sister. Material: This sister birthstone necklace is made of 925 sterling silver and cubic zirconia. The necklace does not contain any harmful ingredients, is