RJ Barrett added 15 points and 14 rebounds while Jones had 13 points, seven rebounds and seven assists while also playing lockdown defense on Shamorie Ponds. The Blue Devils (19-2) shot 56 percent while winning their fifth straight.
Williamson stuffed the stat sheet in this one -- hitting 13 of 17 shots while finishing with five steals, two blocks and a couple of his customary highlight-reel dunks.
He scored 12 points -- all either at the rim or the free-throw line -- during the 26-6 run that bridged the halves and pushed the lead into the 20s. Cameron Reddish capped the run with his fourth 3 of the game, making it 61-39 with about 16 1/2 minutes left.
LJ Figueroa had 14 points and Marvin Clark II added 12 for the Red Storm (16-6), who fell behind by 20 points before they hit a shot in the second half while losing their third in four games.
Ponds, the hero of last year's upset win over Duke and a 20.9-point scorer, had all 11 of his in the second half. He faced relentless pressure all day from Jones, and a couple of his five turnovers led directly to breakaway dunks by Williamson.