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. We hand carved and oxidized the channel where the diamond is set. The oxidation is protected within the channel and is therefore better preserved over time. We love how the diamond really pops against the oxidized channel. These hoop earrings were designed in San Francisco and are handmade in our Upstate New York production studio.