Different sized ressource nodes.

[Nikodemus]

Spawn the ressource nodes in different sizes according to how much "ressources" can be harvested out of them.

And also have them shrink as you empty them.

That way players could tell just how much ore or gems or whatever they can get out of a particular node.
And they can tell when a node will vanish. Because at that time it would be really small. :)

[DeathTiny]

yep would like to see different sizes für normal/rich/motherlod nodes too.

[Jaraiden]

Would be more excellent to tie it in with the Prospecting skill.

With high enough skill, the character can detect the richer nodes easier . . . or get a small bonus when the node is depleted.

Different sizes, well, kinda takes the fun out if you just essentially skip all but the Rich and Motherload/motherlode ones. Same with any depletion bar (well, unless you have high enough Prospecting skill).