Silvertone and CZ Spiral Engagement Ring Ann's Sterling Silver and CZ Spiral Engagement Ring is a unique celebrity style ring that you'll want to get your hands on. The 925 sterling silver, rhodium electroplated ring was designed to look like white gold. It features a spiral design that is encrusted with a bevy of petite size CZ stones. The sparkling CZ center measures .25 carats and shines bright like a diamond.