Carolyn Pollack Sterling Silver White Calcite Ring Genuine White Calcite, Bronze, Brass, and .925 Sterling Silver Measures 3/4" L x 3/4" W See Ruler View for accurate sizing. Silver may tarnish over time. Handcrafted in America with lifetime warranty on all jewelry Sterling silver filigree and a bronze cabochon framed in a brass bezel setting with white calcite.