Thanks! I'm really happy with the way it turned out. Before I got the punch I would hold the paper under the marble and cut around it. Then I'd just keep cutting around until the paper was small enough.
With this punch, though, I made, like 50 of these in no time! I found the punch at Michaels Arts and Crafts store. I had to go to 3 different Michaels before I found one. This is the 1/2" punch made by Marvy Uchida. If you can't find one in the craft store, you can always buy one online. If you need some websites, let me know.
Here's a picture of what the punch looks like. The size of the silver sticker is the size of the punch. You'd think that'd be obvious, but I wasted $8 on the wrong sized one. This 1/2" punch was $3.50 or something like that. . I am so glad I bought it!