Imports In 2007, Sao Tome and Principe imported $48 in Tin ores and concentrates, becoming the 0th largest importer of Tin ores and concentrates in the world. At the same year, Tin ores and concentrates was the 0th most imported product in Sao Tome and Principe. Sao Tome and Principe imports Tin ores and concentrates primarily from: N/A.