You can change or add your own icons (just in case the atlas no longer has the old auger icon) by adding the 160 x 160 PNG to a folder in your modlet called "UIAtlases" and folder inside there called "ItemIconAtlas" from there edit the items.xml file so that it points the auger's CustomIcon to that new (or rather old) icon you've manually added.
This is purely theoretical, I could be wrong here as not tried it.