These black and white channel continuous trapezoid hoop earrings feature 1.5mm diamonds in oxidized "channels." Each hoop measures 1.3/4" by 3.1/4" at its widest point. Materials: Sterling silver (.925), oxidized sterling silver and lab-created diamonds. All materials are hypoallergenic. The black (oxidized) components of our jewelry will wear over time and eventually achieve a beautiful antique-like finish. These hoop earrings are designed in San Francisco and handmade in our Upstate New York production studio.