Botswana Exports of clays, andalusite, kyanite, sillimanite, mullite, chamotte, dinas earths to China was US$51 during 2019, according to the United Nations COMTRADE database on international trade. Botswana Exports of clays, andalusite, kyanite, sillimanite, mullite, chamotte, dinas earths to China - data, historical chart and statistics - was last updated on May of 2024.