Dust rune

Dust runes are combination runes. They count as two separate runes: one earth rune and one air rune. Thus, any spell requiring one earth rune, one air rune or both will spend only one dust rune.

The value of 1 dust rune in Investment Credits in Mobilising Armies is 7 Investment Credits.

Runecrafting Dust Runes
At Runecrafting level 10 or higher, they can be crafted in either of two ways:
 * Pure essence, earth runes and an earth talisman to the Air Altar or
 * Pure essence, air runes and an air talisman to the Earth Altar.

Tiaras will not work in place of talismans while crafting combination runes. Players receive 8.3 experience for combining earth runes at an Air Altar and 9 for combining air runes at an Earth Altar. Combinations have a 50% success rate (or 100%, if the player is wearing a binding necklace), and the talisman is consumed in the process (unless the player uses the Lunar spell Magic Imbue).

Miscellaneous
Members may purchase dust runes from Mage Training Arena north of Duel Arena (unlimited stock; trade minigame points).

Spells

 * Earth Strike
 * Earth Bolt
 * Earth Blast
 * Earth Wave
 * Earth Surge
 * Crumble Undead (removed)
 * Lumbridge Teleport
 * Teleport to House

Trivia

 * As with all combination runes, the greatest number needed for a spell is 30, for the Charge Orb spell series.
 * There was once a bug where you use up 2 dust runes if you have more than one dust rune when using the teleport to house spell; this glitch has been fixed.
 * The Dust rune's inventory icon, along with the other combination runes, was unaffected by the update on 9 June 2010. The other runes were slightly twisted.

Dust rune Dust rune Dust Rune