1. A method for two-stage classification of a granular material (A 1 ), comprising the steps of: separating said granular material (A 1 ) in a first classifier (S 1 ) into a first oversized material (G 1 ) and a first undersized material (F 1 ); separating said first undersized material (F 1 ) in a second classifier (S 2 ) into a second oversized material (G 2 ) and second undersized material (F 2 ); and recycling at least a substream ( 11 ) of said second oversized material (G 2 ) from said second classifier (S 2 ) to said second classifier (S 2 ).