Crystal blue persuasion vtg earrings screw back no flaw aqua blue ornate Design

The first picture is the only good one , sorry about my lack of camera skills. The color is aqua blue not sky blue. The design on the back is a swirled metal silver tone, no markings noticed. No flaws seen . probably from the 40s. please see other vintage earrings in my closet , rhinestone and Crystal, blue and other colors , thank you.