Prythium, a greenish ore which acts as a source of fuel, kinda like Uranium in many mods.
Goldchunks. same as Ironchunks.
DiamondChunks. same as Ironchunks and Goldchunks
Cebranite. A gem, Diamondlike. Extraordinarily hard material, even harder than Diamond or even Obsidian, and thus mines it in a few second. Very brittle, so only has like 64 uses.
Cebranitechunks if course.
Titanium. strength and durability inbetween iron and diamond. IMHO Diamond is an "endgame" material. the only real goal is to get Diamond, then Diamond tools and the world is yours. Titanium is a more common, slightly inferior alternative for Diamond.