Pin of interlocking, swirling lines in brass with center glass stone in blue with foiled markings. The glass is rough, not smooth, may be art glass or "End of Day" glass. The stone is prong set. Setting is soldered together by hand with brass pieces that were stamped out in a factory. Round hinge and c clasp. This is an Art Nouveau pin. 1 3/4" long. 7/8" wide