Miriam Haskell Glass Pearl Cameo Necklace

Miriam Haskell Glass Pearl Cameo Necklace. The necklace is stamped Miriam Haskell and 3.984.900 which is likely the item number. I believe the cameo is glass. Measures 14 1/2" in length and the cameo pendant is 1 1/8" by 1". Very good condition.