Vintage sterling silver Art Deco amethyst purple princess cut / square crystal riviere necklace bezel set, open backed, by W H Collins gift but an acid test shows

but an acid test shows it is completely solid silver

The necklace is around 15 inches in length along the shortest edge

There were many different designs all commissioned and overseen by Coro's renowned Head Designer Adolph Katz and much of the work was patented by him to prevent it from being copied

None of these clips is signed

Vintage sterling silver Art Deco amethyst purple princess cut / square crystal riviere necklace bezel set, open backed, by W H Collins gift but an acid test showsVintage sterling silver purple violet square princess cut crystal riviere necklace Art Deco or possibly earlier (Edwardian or 1920s). Lovely sized sparkling light purple crystal rhinestones, bezel set in lovely open backed sterling silver raised settings, connected by sterling silver double links. The necklace has a length of up to 16 inches, and is adjustable using the secure spring ring clasp and length of extension chain. The two settings on either