As for drilling rocks, you also need a hammer drill to put the masonry bit into. A normal drill will work, but it will take forever and possible ruin the bit. Also, get some acrylic rod. You dont need to go all the way through, I would say about 1/4 to 1/2 way through would work.
+1 use a masonry bit, the rock actually drilsl really easy as long as it's good porous rock, don't let the drill spin too fast because the rock will just break...don't ask how I know, I just do...