Ok I'm stuck. Went below and met imps. Can only find two red gems. Cannot find the amber gem. There are three or four doors that are locked and I can't find lever or key. Found several levers and pulled them and cut scene where something opened. Anyway, area where the idol is you're supposed to put a red and amber gem, I see a locked room and next to it a hole in the ground. I assume this area is critical. Where can I find the amber gem? Also found area with stairs going up and down and found several locked doors there also, but for now how do I get this gem? Thanks all again.