Go casual or dressy in this elegant pair of double droplet earrings, featuring our Celestial Blue gemstone with a mother-of-pearl backing. Gemstone: Celestial Blue (man-made). This rich blue synthetic gemstone is handcrafted as a doublet, a technique that lends it extra iridescence through a mother-of-pearl backing. Metal: DD Signature Brushed Gold Plated Over High-Quality Brass.