Which country is the largest exporter of the Brazil nut?

The Brazil nut (Bertholletia excelsa) is a South American tree in the family Lecythidaceae, and also the name of the tree's commercially harvested edible seeds.

Despite their name, the most significant exporter of Brazil nuts is not Brazil but Bolivia, where they are called nuez de Brasil. In Brazil, these nuts are called castanhas-do-pará (literally "chestnuts from Pará"). Though it is commonly called the Brazil nut, in botanical terms it is the seed from the fruit of this tree. To a botanist, a nut is a hard-shelled indehiscent fruit.

Around 20,000 tons of Brazil nuts are harvested each year, of which Bolivia accounts for about 50%, Brazil 40%, and Peru 10%. In 1980, annual production was around 40,000 tons per year from Brazil alone, and in 1970, Brazil harvested a reported 104,487 tons of nuts.