These beautiful earrings are composed of 92.5% sterilng silver and rhodium plated, adhering a sparkly finish, in order to improve its apprearance and resist any tarnishing. CZ accents fulfill its delicateness and further deliver its brilliant look. 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.