These beautiful earrings are composed of brass. The gold plating enhances its shininess. Cubic zirconia accents fulfill its delicateness and further delivers its brilliant look. In dedication for those with sensitive skin, we have further developed our products by upgrading our posts to .925 sterling silver. The Screwback is a safety back that screws on and locks thus preventing for any poking in the back of the earlobe and lessening chances of lost earrings.