Vintage Clip-On Earrings Blue Crystal Bouquet with Silver Leaves

1-1/4" x 3/4". 5mm stones sparkle with light & movement. Blue stones form what looks like a floral bouquet with silvertone leaves. I don't know if these gemstones are crystal, glass or rhinestone. When upside-down, they look like grape bunches. Earrings are not signed/stamped.