0.3μm Real 6 Times Heavy 14K White Gold Plating So It Won't Tarnish. 4 Prongs Hold Every Stone Closely and Securely To Avoid Stones Loosening And Allows The Maximum Amount Of Light To Both Enter And Leaves The Stone for Maximum Bling and Shine. Heavy duty European locking closure keeps bracelet securely on your wrist. No worries! Absolutely Stunning Bracelet.