Blue Floral Cloisonne Ring

Blue enamel flower with a turquoise colored center stone. I bought this from an estate sale and have no idea if the turquoise in the center is real or not. The ring is stamped “silver” on the inside. Each piece looks to be made out of wire and then filled with enamel. Has imperfections in the enamel (two big ones, see first picture) and the band is tarnished. Most likely vintage.