I believe this to be blue glass & brass. Host Pick for Summer Look Book. It’s challenging to find beautiful blue jewelry for formal attire. This piece looks nice on a simple blue sweater or peeking from the neckline of a silky, collared blouse. The blue glass components are free of injuries and are uniform in color. The piece is in excellent, vintage condition. Mannequin necks can be deceiving with appearance of length in photos. This is an approximately 16 &1/4” necklace. New to Poshmark? Use the code: shippingsleuth when you register to get $10 off your first purchase.