Abstract: A sluice box has an open box frame formed from a plurality of welded beams. A trough having an arcuate transverse cross section is suspended in an inclined fashion within the frame by a plurality of chains. A low end of the trough has an end wall with a central aperture which serves as a sand drain. A transversely extending water overflow drain channel is disposed adjacent the low end trough wall. The bottom of the trough is provided with a series of spaced transverse ridges. A variable speed motor having a rotary output shaft with an eccentric weight and a cooling fan is secured to a bottom exterior surface of the trough, adjacent the low end wall, and serves to vibrate the trough. A second variable speed motor is utilized in conjunction with a pitman wheel and arm for reciprocating the trough from side to side. A pair of arcuate levers are pivotally mounted to the frame on opposite sides of the trough.