Non-linear reward system
One dust gave me 252 coins, 2 cosmic runes, 2 astral runes, 0 gold ore and 2 minutes of mining boost.
This is not 1/200th of the reward for 200 dust so they seem to be using a very odd formula. I may investigate this more in the future but can't currently gain too much Mining experience. 15:09, March 9, 2014 (UTC)