Laos Exports of natural barium sulphate (barytes), natural barium carbonate (witherite) to South Korea was US$50 during 2020, according to the United Nations COMTRADE database on international trade. Laos Exports of natural barium sulphate (barytes), natural barium carbonate (witherite) to South Korea - data, historical chart and statistics - was last updated on May of 2024.