Copper now breaks into four different pieces instead of four copies of the same lump. Mine a copper rock out and look at what is lying around it: one biggish chunk and several little angular ones, all of them smaller and flatter than the stones beside them, and each piece keeps its own shape when you reload.
The little ones come to rest nearer the broken rock than the old lump could, because a smaller piece needs less clear ground around it. The copper rock itself is unchanged: it is already real metal where the seam shows, but only about one per cent of the boulder’s surface is drawn as ore, which is a separate change still to come.
