0.3μm Real 6 Times Heavy 18K White Gold Plating So It Won't Tarnish. Each Stone is 2Ct. 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. Double locking Latch keeps bracelet securely on your wrist. No worries! Absolutely Stunning Bracelet.