What is country is the world producer of coffee?
Brazil, although most of it is Robusta.
Africa has the largest producer in the world Africa is not a country - it is a continent. Zimbabwe (a country within the continent of Africa) has largest known concentration of diamonds in the world. Actually, I believe that Botswana is the largest producer of diamonds in the world. If Zimbabwe had as much in reserves of diamonds as Botswana, they would probably have their own currency.