I've recently been into filling up my Mac palette.. and this fits perfectly! Pictures after the jump!
Depotting this is really easy!
Try to wedge a thin knife into where I have shown. If you wedge it in there real good, you'll be able to pop the top part of the shadow out.
This is what the back looks like. Loosen the glue holding the eyeshadow pan to the plastic by dropping a few drops of alcohol into the tiny hole on the back. Then just take a hard and pointy object like a thumb tack or nail and poke the whole. Gently ease it out, you don't want to crack the shadow.
After gently pushing out the shadow, add a magnet, and you are done!