1.25 CT Princess Cut CZ Engagement Ring This princess cut CZ engagement ring is an instant classic! Thin sterling silver band holds a 1.25 carat CZ atop the ring. Prong set, princess cut CZ mimics a traditional diamond engagement ring. AAAAA (5A) quality CZs are the highest grade - they look very similar to real diamonds! Sterling silver has durable .03 micron rhodium electroplating. A thin layer of copper between the silver and rhodium helps to create a smooth, strong plating. The manufacturer states that with proper care the rhodium electroplating should not wear down within the first year of purchase.