Bar pin appears to be brass over copper rendered in Art Nouveau style. Ruby colored (glass?) faceted stone surrounded by swirls of wire ending in delicate leaves. C-clasp, round hinge. "C.T." hallmark on c-clasp, so pin is dated 1915 and onward. Likely stands for "Cheever, Tweedy Co. Attelboro, MA" 2 1/4" long 9/16" wide