Huge space dust is an item that can be won from Treasure Hunter as part of the Meteor Storm promotion added on 21 January 2016. When used it will give 33% more bonus experience in a chosen skill than a prismatic huge fallen star, or 100% more if used in one of player's five lowest skills. When the player has multiple space dust in their inventory, they are given a selection on which one(s) to use. If the player's Dungeoneering, Invention, and/or Slayer level is less than 120 those will count as lower than any level 99 skill.
- Before an update on 12 January 2017 the bonus experience boosts were 25% and 75%.
- On the day of release the lowest seven skills got the 75% boost, due, presumably to a bug.