Botswana Imports of pumice stone, emery, natural corundum, garnet, other natural abrasives from Canada was US$19 during 2017, according to the United Nations COMTRADE database on international trade. Botswana Imports of pumice stone, emery, natural corundum, garnet, other natural abrasives from Canada - data, historical chart and statistics - was last updated on May of 2024.