The swan made mid century would look nice on the right outfit. It has a gold tone metal body with a polished river stone belly and ruby red eye. The locking pin on the back still works great. I do not see a makers mark so I am calling this costume jewelry. The swan measures 1 inch tall and 1-1/2 inches wide.
Vintage Swan Brooch Pin Gold Tone with Ruby Rhinestone Red Eye & Polished Stone Body