In this study, recovery of feldspar from trachyte by flotation was studied. A feldspar concentrate containing 5.72% K2O, 5.33% Na2O, 0.321% Fe2O3 and 0.080% TiO2 was obtained from a feed containing 5.20% K2O, 3.37% Na2O, 1.778% Fe2O3 and 0.253% TiO2 with an overall recovery of 22.4% by weight. (c) 2005 Published by Elsevier Ltd.