This stunning vintage St. John double strand 20.5" necklace exudes elegance with its beautiful blue Lapis Lazuli stones and sparkling Rhinestone accents. The lobster closure and gold tone metal add a touch of sophistication to this piece, making it the perfect addition to any jewelry collection. This necklace is a must-have for any fashionable woman who appreciates vintage jewelry. Its unique design and high-quality materials make it a true gem. Add a touch of class to any outfit with this beautiful St. John necklace.

This would make a beautiful set!  Another vendor is selling the matching bracelet:  
Fabulous St. John Lapis and Rhinestone Bracelet | eBay