Powder Blue Cabochons & Royal Blue Rhinestone Screw Back Earrings! These are so cool! Great design to them in two very beautiful shades blue! These are in excellent vintage condition, minty! All stones are prong set in gold tone metal. No signature, which seems to be the case for most screw back earrings. Nevertheless, they are fabulous & measure 1 1/8 by 11/16 inches. Powder Blue Cabochons & Royal Rhinestone Screw Back Earrings