This is a silver, Victoria Golden Jubliee Brooch. It has the dates 1837-1887 on it, as well as enamel work and the initials "VR". The nice thing about this one is the glass covered pocket on the back where one could put a photo or lock of hair of a loved one. The piece measures 1 and 1/2 inches long, and 1/2 inches wide.
Victoria Silver. Golden Jubilee Brooch, 1897