Polished iolites alternate with links of gold-plated brass. Adapted from a Roman necklace in Berlin's Ägyptisches Museum, the links are Herculean knots, used in jewelry since the 4th century B.C. The knot symbolizes the perfect union of two partners. 20" necklace (XC2942) secures with an S-shaped clasp. Earrings (XC2952 - sold separately) hang 2". USA.