Glass is a Resource made by Smelting Sand in the Furnace after unlocking Crafting Research 1. It is primarily used for making Vials, used for Brewing Potions. Used in Item Crafting level Amount needed 36 20 5 1 12 20 32 20 39 20 62 20 65 80 80 20 Categories: Crafting Smelting Community content is available under CC-BY-SA unless otherwise noted.