Oman Exports of bitumen and asphalt (natural), bituminous or oil shale, tar sands to Iran was US$36.05 Thousand during 2018, according to the United Nations COMTRADE database on international trade. Oman Exports of bitumen and asphalt (natural), bituminous or oil shale, tar sands to Iran - data, historical chart and statistics - was last updated on May of 2024.