Congo Exports of clays, andalusite, kyanite, sillimanite, mullite, chamotte, dinas earths to Zambia was US$38 during 2024, according to the United Nations COMTRADE database on international trade. Congo Exports of clays, andalusite, kyanite, sillimanite, mullite, chamotte, dinas earths to Zambia - data, historical chart and statistics - was last updated on October of 2026.