Open bottom with foil showing. Rhinestone is round and light green with lots of reflection. 

This is a square brooch that measures about 1 1/4" across and the silver tone metal frames the stone. 

The rhinestone itself measures about 1/2" across. The pin back clasp is welded to the body of the brooch. 

Very good condition. Very minimal signs of wear. Clasp works fine. Please see all pictures.