Also, look at this...
http://jazzjackrabbit.com/images/shots/press5.jpg
This is what the blue gem first looked like. I think it looked cooler, don't you? :-p

http://jazzjackrabbit.com/images/shots/treasure1.jpg
Here's a good look at the red gems...

http://jazzjackrabbit.com/files/shot1809.zip
http://jazzjackrabbit.com/files/shot2503.zip

Those are more screenshots, I'm gonna look at them now.