This is a rare bubble "Saint Anne De Beaupre" enamel double sided cobalt blue pendant. The silver pendant measures .88 inch by .75 inch and comes on an 18 " long silver tone chain. This is a rare treasure that I bought from a local estate sale. The necklace had been inherited from a family member who was a nun. Mercury Antique enamel St Anne De Beaupre bubble pendant necklace can be found here.