this is a lovely Vintage Italian Micro Mosaic Glass Tile Brooch Pin.  Maybe from the 50's, pictures 3 flowers.  It's size is about 1  1/4 inches wide.

  These wonderful pieces are from talented Artisans using a labor intensive process where each segment is inserted by hand in a mosaic motif.    There are no missing or broken Tiles.  A gentle gold tone metal  pattern surrounds the upper edging of the Pin which is secured with an older "safety pin" style clasp

It is marked Italy and is authentic.