At the turn of the 20th-21st centuries, the mining and technical conditions of the development of placer gold and platinum deposits have significantly worsened, in particular, the clay content in the sands has significantly increased. The proposed technology includes pretreatment of the developed clay sands with mechanical particles and provides a reduction of technological losses of the valuable component by 20-75%, which will allow for effective development of placer deposits of gold and platinum at low cost.