If you want to spice up the loot your players find in Dungeons & Dragons, I’ve got an unofficial supplement for you. DM Done Easy: Ultimate Treasure, Art, and Jewelry/Gem Generator from Matthew Moyer is an Excel workbook that will help randomly generate loot for you. There’s also a sheet for the Robe of Useful Items magic item! The instructions on the first sheet are pretty clear and will help you use the tool to its fullest capabilities.
“Tired of giving your players the same old bland treasure? Need to flesh out a room description for your DM’s Guild adventure? Say hello to…DM DONE EASY: Ultimate Treasure, Art, and Jewelry/Gem Generator!”
You can purchase DM Done Easy from DMs Guild for any price you deem worthy.