Item Type: Engagement&Wedding Band Surface Width: 2.7mm Setting Type: Prong Setting Main Stone Type: 2 piececs 1ct(6mm*6mm) and 1 piece of 2ct(7.5mm*7.5mm) cushion cut moissanite,total 4ctw Metal: Sterling silver Guarantee 1: Moissanite As Brilliant As Genuine Diamond Guarantee 2: Moissanite As Lasting As Genuine Diamond Guarantee 3: Moissanite Test Positive by Thermal Diamond Testers.