Shares of the No. 1 social network rose sharply Mon. before closing 1.4% higher to 24.71 after it rolled out a new version of a social search tool, upping its rivalry with search leader Google (GOOG). The Facebook (FB) tool, called Graph Search, is designed to make it easier for users to find people, places and photos. Graph Search debuted in Jan. on a test basis. Over the next few weeks it will become available to everyone who uses Facebook in U.S. English. The company is working on a mobile version. Google shares rose 1.3% to 905.09 .