(September 24, 2018, 10:26 AM EDT) -- BOSTON — After an investor in an Oman limestone quarry failed to defend a petition to confirm an international arbitral award issued in favor of the Sultanate of Oman, a Massachusetts federal judge on Sept. 18 entered a default ruling and ordered him to pay $5,691,604.61 (The Sultanate of Oman v. Al Tamimi, No. 1:18cv11291, D. Mass.)....