Lovely vintage Madonna and Child brooch.  I believe the brooch consists of a small oval porcelain plaque mounted on a piece of black plastic surrounded by a faux pearl border. This belonged to my grandmother.  There is a small area of discoloration/residue on the back of the brooch where there may have been something attached so that you can wear it as a pendant.  Brooch is roughly 2" X 1 3/4".