Opal teardrop pendant necklace for birthday gift, October birthstone necklace for her, Anniversary necklace for wife and girlfriend. The opal teardrop necklace is 925 sterling silver. We combined a round-shaped white opal pendant with a chain. Desgin: The teardrop white opal necklace has a unique color and is very suitable for wearing during all season. Bright colors can add highlights to the wearer's outfit, making them look more beautiful and elegant.