Coro Turquiose Robin Egg Blue enamel rhinestone silver ring

Large statement cocktail oversized ring. Probably vintage, signed Coro and Thailand. It appears to be silver but there is no sterling silver stamp. Priced accordingly. Robin egg, or turquoise blue. Size 6.5, approximately. Excellent condition.  Would look wonderful with the Joan rivers turquoise and coral color beaded necklace shown, ask! Also matches adjacent listing for Stella and Dot necklace. Bundle for savings!