I just post the tutorial on my other blog of how I made my pendant. You can see it HERE.
For the sake of the argument, many people had called it "Hidden Magic" technique. For me, there is no magic there because I was the one who hide the treasure underneath that Black&White sheet, so I know exactly what the result is going to be.
There are many different ways to do it and it is "Magic" because your will get the image that is unexpected, just like the techniques used by many French clayers.
***The rubberstam sheet that I used is from Barbara McGuire's. www.alteredartsource.com ***