This set can be seen in the new book by Ann Pitman, Juliana Jewelry Reference, DeLizza & Elster Identification & Value Guide, on page 157.  This set is a very pretty combination of colors and shapes.  The top layer has blue diamond shaped stones, green marquise, and a central blue chaton.  The bottom layer has amethyst marquise and ab rounds.  All stones except the rounds are open backed. The metal is gold toned. The earrings are clips and have the same stones as the brooch.  In excellent vintage condition.