So I found a Galena/Silver vein and brought my iron pickaxe but it won't break the Galena ore. Is there a chart showing the "levels" of pickaxes, such as which pickaxe material is needed to break a certain ore? I found a graphite/diamond vein but same thing - iron will break the graphite ores but not the diamond. I'm nowhere near making steel yet, but is a steel pickaxe what I will need to mine these higher-level ores? The FTB wiki is good for Gregtech, but it doesn't tell us a lot of important information like this (as far as I could find, anyways).