Bingowings said:

In the trailers we see the same 'chalice' from the beginning in the position of the mysterious green jewel. I'd put that back.

Some nice ideas again for what might have been, Bingowings. I definately wish you'd been the one to come up with the plotting in this case, rather than Lindelof and Ridley!

I'm still scratching my head as to why that 'chalice' bowl got switched to a 'green crystal' in the first place. I wonder if it was just a last-minute 'visual' thing with no real reason, or not?...just like a lot of other moments in this movie seemed to be.