Alright i made a small jewel clearing thread because too many have asked( i bet you some still will but noobs are noobs)
Remeber do this on your own risk
Removing The Jewel
There are two mainly used ways to remove a jewel
The Hairdryer Method: This method is probally the quickest. To do this you first get a hairdryer and you aim it under the backside of the jewel. You keep if thier on high speed until the plate under the jewel is just hot enough to touch. Then you take a jewelers screw driver and pry underneath and remove the jewel
The Freezer Method: You put the top of the case in the freezer and let is cool for about 2 or so hours or even over night. Then you take a rubber mallet or a shoe and give the back of the jewel a couple of good whacks and the jewel should pop right off
Okay now here is the front of a stock jewel

Here is the back of a stock jewel with the adhesive removed

Note: to get the black adhesive off of the jewel you use your fingernail to pick it up then push with your thumb this will make the process go quicker
These are some chemicals that you might have in your house that might work to clear your jewel

From left to right -
Easy Off Oven Cleaner
Non Acetone Nail Polish Remover
Brasso Metal Polish
Goo Gone
Adhesive Remover
Most of these should be found at a local harware store or ask your mom or a sister for these items. Use non - acetone nail polish remover because acetone can cloud up the jewel. Now i chose to use brasso since it gives the best results.Now take some brasso and put it on a rag and buff away. After about 30 - 45 min of solid buffing oyu should have somthing like this

here is how it looks

