I just found out through JEI that there exists a recipe to make ancient cobblestone through the crucible after unlocking Exploring the Emptiness but it's recipe is not displayed anywhere in the page. I'm not sure if this was an intentional decision or not.

Also I personally think it would be better to group up the ancient block recipes similar to some of the vanilla thaumcraft recipes like the dyed nitor. I'm not sure what the mod did for that though since it does do a lot of funky stuff. ^^;