ART NOUVEAU 18K YELLOW GOLD, RUBY, DIAMOND AND PIQUE-A-JOUR ENAMEL RELIGIOUS MEDALLION ON 18K YELLOW GOLD CHAIN. Shaped rectangular pendant depicts Madonna centered by two vertical rows of calibre-cut rubies, and crescent and bar of numerous rose-cut diamonds - L: 1 3/8 in., chain: 27 in. PROVENANCE: Estate of Jim Graham, former Washington, DC, Councilman Estimate $400-600