Low level alchemy

Low-level alchemy is a conversion spell available at level 21 Magic that converts an item into coins, usually the value when sold to a General Store. It costs 3 fire and 1 nature rune to use, and yields 62 experience per successful cast.

Casting a single alchemy spell on an item stack such as certificates, runes, or arrows will consume the entire stack and produce coins for every item in the stack. This can be a dangerous feature, so be careful when casting alchemy spells that you do not accidentally click on any stackable item you wish to keep.