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From left, Cabochon-ruby diamond and gold ring, $175,000 at David Webb Inc., 789 Madison Ave., nr. 67th St. (212-421-3030). Panther ring in eighteen-karat yellow gold with white and yellow diamonds. Price available upon request. Cartier, 653 Fifth Ave., at 52nd St. (212-753-0111). Yellow sapphire, diamond, and platinum Ribbon bracelet, $28,000, and diamond-and-platinum Ribbon bracelet, $35,000, at Verdura, 745 Fifth Ave., nr. 57th St. (212-758-3388). South Sea pearl-and-diamond bracelet set in gold and platinum, $47,500 at David Webb. Sophie Theallet for Motu Tane silk-satin dress, $1,400 at Janet Brown, 4 Carlton Ave., Port Washington, N.Y. (516-883-2670).