I have never found any crystal clusters, infused stone, or any other thaumcraft block on my server except for the earth/air/fire/water/dull crystals that you mine. I know my world has the nodes though because it has been charging my wand of charging but like i said, never found harvestable crystal clusters or nearly any other thaumcraft block. I am pretty new to thaumcraft and as such don't know what to be looking for and all this could be totally normal but I need opinions.