A system and method for separating granular particles according to particle size, and more particularly enhance ore grades by removing unwanted material. The system (10) comprises means (11) for transporting granular material (12) comprising multiple sized fractions with gradation of the particles according to particle size between relatively fine fractions and relatively coarse fractions, in a direction having a horizontal component; and subjecting the granular material (12) to vibration while being so transported to induce some separation of particles according to particle size. The system (10) further comprises means (13) for causing the granular material (12) to subsequently move as a granular flow (14) along a curved path (15) under the influence of gravity to further induce separation of particles according to particle size. The system (10) still further comprises means (16) for dividing the granular flow (14) moving along the curved path (15) into different streams (17) according to their trajectory.