Vintage DeLizza & Elster Blue Milk Rhinestone Silver tone Choker Necklace 1960s 
The necklace is made of silver tone metal and features baby blue milk rhinestones in a marquise and round shape, and shiny blue crystals, it is 15 inches long and has a hook closure. 
The necklace is perfect for occasions such as Mother's Day, Graduation, Wedding, Anniversary, Birthday, and Christening. 

It is a fashion and costume jewelry midcentury piece and was made in the United States.