These beautiful earrings are composed of 925 (92.5%) sterling silver and rhodium plated in order to improve its appearance and more resistant to tarnishing. The cubic zirconia (CZ) is a delicate add on and further deliver its brilliant look. The screwback is a safety ball earring backing that screws on and locks thus preventing for any poking in the back of the earlobe and lessening chances of lost earrings. These are for the safety of everyone from adults, teens, toddlers, to babies. Your baby girl deserves to be safe and unharmed at the same time look cute with their brand new earring.