10K Yellow Gold Butterfly Simulated Diamond CZ Screw Back Earrings Adorable 10K Yellow Gold Butterfly earrings measure 4.5mm in length and 5mm in width and feature High Quality Simulated Diamond Cubic Zirconia (CZ). High Polished for a shiny, smooth and comfortable fit. ?SAFE AND SECURE? Screw back is a safety back that screws on and locks thus preventing any poking and minimizing chances of lost earrings. ?HYPOALLERGENIC?Safe for people with sensitive skin. Our fine jewelry is manufactured with authentic metals and are solid stamped 10K/14K Gold, 1/20 14K GF or 925 Sterling Silver. ?SAFE FOR YOUR CHILD'S PRECIOUS SKIN? Being parents ourselves, we at AVORA make a point of using nothing but the most reliable materials for making our baby/kids products. Our crystals do not contain heavy metals or chemicals. Moreover, our metals go through a strict quality control process to ensure only the safest materials will touch your child's ultra-sensitive skin.