Oh, another thing:
I need silicon now to make a boule. Can i find silicon via silicon bearing rocks in the overworld or am I wasting my time looking for a vein?
I looked up the Gregtech 6/Stones and Minerals section of the FTB forum but Silicon isn't mentioned once I think
EDIT: found ways to make silicon via silicon dioxide. Still, is there silicon ore in the game at all? I see the recipes but I wonder if all the stuff (silicon dioxide seems to have it's own ore too) can actually be found or if these recipes are just auto-generated recipes?