RAPAPORT NEWS, an international network of companies that provides information about the diamond and jewelry business worldwide, reports that executives at O, The Oprah Winfrey Magazine, refused this week to receive a small group of activists who were accusing Israeli diamantaire Lev Leviev of involvement in human rights abuses in the Middle East and Africa. The activists, affiliated with Adalah-NY, an advocacy group focused on boycotting Israel and Israeli products, were rebuffed in their efforts to meet O executives at the magazine’s headquarters at the Hearst Corporation in Manhattan.