Abstract: A gold sluice includes an elongated semicylindrical trough having angular corrugations therein for imparting a longitudinal turbulent flow to water moving gravitationally therethrough. The longitudinal spiral turbulence of the water promotes separation of heavy particles from a placer material placed at an upstream end of the trough. Gold, being a heavy metal, will settle into the corrugation grooves along the trough. The sluice further includes laterally projecting flanges on opposite longitudinal side edges of the trough for preventing the trough from overturning laterally. The sluice is formed of a single sheet of lightweight material with the semicylindrical trough extending integrally therein and with the corrugations formed integrally within the trough. The corrugations are angularly oriented with respect to the longitudinal axis of the semicylindrical trough configuration.