Jen's 5 ct Silvertone and Cushion Cut CZ Engagement Ring Sparkling engagement ring with cushion cut stone. The cubic zirconia ring is made from sterling silver metal. The center stone measures five-carats. A row of round cut CZs extend partially down each side of the band. The shoulder of the engagement ring features another row of CZs for added sparkle. The underbezel features additional CZs as well. This cubic zirconia engagement ring is a great alternative to high priced pieces.