Low level alchemy

A High or Low level alchemy tablet can be made with 1 nature rune, fire runes (3 for low, 5 for high, or use fire staff), and a soft clay. At a Demon Lectern you can make low level alchemy, at mahogany demon lecterns you can make high level alchemy tablets. When you click "break" you choose the item you wish to convert to coins, and then you cast the alchemy spell. The magic experience comes by making the tablet, though.