Art Deco Celluloid Square Stone on Brass Setting Enameled Lotus Blossoms on Each End

This is a lovely Art Deco Pin with a celluloid stone. It is in the Egyptian style with a lotus blossom on either end enameled in blue. It is about 2x1" and is all brass with verdigris on the pinback mounts. I did clean it a little and it isn't as obvious as it was.