Gravity separation is widely used to treat wide range of materials of various sizes. Gravity concentration methods are based on the relative movement of different material under the gravity of other forces.

For the relatively coarse material, jigs are very efficient to achieve the gold and still the most widely used coal-cleaning device, despite the fact that it is one of the oldest methods of gravity concentration.

Another popular gravity concentrator is shaking tables. Compared to jigs, it is more suitable for the smaller minerals like selecting finished products. Gravity separation is widely used to treat wide range of materials of various sizes.