Carolyn Pollack Sterling Silver Blue Lace Agate Twist Ring Genuine Blue Lace Agate and .925 Sterling Silver Measures approximately 3/4" long x 3/4" wide See Ruler View for accurate sizing. Silver may tarnish over time. Handcrafted in America with lifetime warranty on all jewelry Blue Lace Agate is surrounded by a setting of detailed sterling silver in a rope swirl design.