Diamond Veneer Cubic Zirconia Center w/Stations Couture Necklace Center Stone measures 12CT Square Cushion Diamond Veneer. Stations set with .5CT Round Zirconite Cubic Zirconia (approx. 8CT TW). This is a new breed of exceptional Diamond quality stones well exceeding industry standards and is known as 8A CZ quality. Hand cut with 30% extra depth (thickness), and ultra-radiant Diamond Like cuts, allowing for more light dispersion resulting in more Fiery stone Diamond appearance.