Ground mud runes are an item used during the Eyes of Glouphrie quest by using a pestle and mortar on a Mud rune, awarding the player with 1 Herblore experience. Adding them to a bucket of sap turns it into magic glue which can be used as a glue to repair a broken machine in Brimstail's cave near the Gnome Stronghold.
Ground mud runes are also used to make Extreme magic potions, by using ground mud runes on a 3-dose Super Magic potion at level 91 Herblore, granting 250 Herblore experience.
Ground mud runes
| Herblore level||1|
| Members only||Yes|
- Mud runes are one of the only two runes that can be ground with pestle and mortar, the other are Astral runes.
- Ground mud runes weighed more than normal mud runes, which like all stackable items weigh nothing. After 10 March 2014 they are now stackable themselves.