Never worn bunny necklace. So cute! 925 Sterling Silver Necklace -- White gold plated, hypoallergenic and high polished finish, Tarnish Resistant, Nickel Free,suitable for sensitive skin. Pendant size is 18mm / 0.71 "; Total weight : 3.7g;Chain length: 45cm+5cm (18"+2" Extender). Opal Necklace -- This cute necklace is made of synthetic opal stone,it can catch the light at all angles flashing different colors as the light moves across them.