Signed Corocraft.  Gold tone swag necklace with Lavender and amethyst colored rhinestones.  This pattern is called La Reine and is featured in a 1955 Coro ad as well as being a book piece featured on page 119 of Collecting Costume Jewelry 202 by Julia Carroll.

The necklace is 16" long.  I note minimal wear on back where the links connect, but this is only noticeable on close inspection.  This is a hard to find color in this pattern.