The way I took off my jewel was real easy (After dremeling). I dremeled around the jewel in the back, to take out the black plastic behind the jewel. If your careful you will not ruin or touch your jewel. After the plastic was out, I could see the back of my jewel. Then I layed my cover with jewel face down on my bed so when I apply pressure to the jewel from the back the jewel can still pop out and not damage my xbox. Then I took a colone bottle which is about the size but just a little bit smaller then the size of my hole that I cut out, any glass bottle or hard flat object would work..I used a colone bottle since it was the right size and it was glass. Then I applied a considerable amount of force from the back, don't worry about breaking the jewel if the object applying pressure is covering most of the jewel. Then the jewel popped off intact, glue and everything, then just peel off the layer of rubber glue and voila!
Hope it helps anyone!