A sample assaying 1.7 lb. U3O8 per ton, representative of ore from the South Hill Prospect Lode and submitted by the Radium Hill Project, was tested by heavy-media separation and flotation. A heavy-media concentrate of 7.2 lb. U3O8 per ton containing 73 per cent, of the uranium in the H.M.S. feed was obtained when the minus one-inch plus 10-mesh fraction of the ore was treated at a medium specific gravity of 2.79. This fraction, together with the minus 10-mesh fraction of the ore represented a recovery of 80 per cent, of the total uranium, at a grade of 3.9 lb. U3O8 per ton. Flotation of this combined fraction produced a concentrate assaying 12 lb, U3O8 per ton, representing an overall recovery of 70 per cent, of the uranium in the original feed. Owing to the mode of occurrence of the davidite in the ore, recovery was lower than that obtained on normal Radium Hill ore.