Abstract: The separator comprises a housing with a charging apparatus arranged above an apparatus for delivering and preparing the ore in a layer one grain thick. The apparatus for delivering is made as a bowl provided with a drive for rotation. Enveloping the bowl is a vertical partition dividing the interior of the housing into annular compartments for receiving the products of separation. Disposed above the bowl is a horizontal light-insulating partition on which X-ray tubes, photocells and air ejectors are mounted. The horizontal partition is formed with an opening to receive the charging apparatus and with slots for the passage of X-ray radiation, X-ray luminescence and air pulses.