This is a Pair of Black Glass Jet "Cameo" and are Clip-On Earrings. The Cameos are facing opposite ways. They are signed "Jonn'e and are open on the back of the mountings. The Earrings measure 7/8" in length by 5/8" across and the Cameo's measure 3/4" in length by 1/2" across. These earrings are Costume Jewelry, but still are very Elegant and Classy appearing.