These icons represent categories that contain a diverse arrange of items. In order to make to avoid confusion with the actual items we made them look simple and generic.
Category icons for Gloves, Helmets, Armors, Boots, Shirts, Fabric, Rocks, Crafting Stations, Potions, Vaults, Inventories, Liquids, Rings, Gems, Necklaces, Bracelets, Wood, Speed, Props, Boxes, Bags, Tools, Weapons and Grappling Hooks.
