Absolutely stunning. In the style of Yurman and Hardy, her designs are very contemporary and dramatic for today's profile fashions. Judith Jack has been designing jewelry and accessories since 1969 and is known for her beautiful marcasite and sterling accent jewelry. Measurement: 19" / Width: 9.5 mm. Locking tongue closure. Hallmark: Sterling / JJ in a Triangle. Weight: 78 grams.