@JeremyECrawford I hope u can help. If STR 10, Item that increases STR (Ioun Stone) & item that sets Score (ogre gauntlets) stack for a 21?
— Héctor A Toledo H (@KorhilTohru) August 23, 2016
The Ioun stone specifies that it doesn’t raise your ability score above 20 (DMG, 177). #DnD https://t.co/WQHChoxKYZ
— Jeremy Crawford (@JeremyECrawford) August 24, 2016
Gaunlets of ogre strength says thay your strength is 19 meaning it is that exact strength no more no less.