I thought I would start by explaining how I make one of the simplest plates and yet everyone loves them. It involves just 2 sheets of Bullseye Glass (www.bullseyeglass.com). The base can be any color you want, although I have found that deep royal blue (shown in picture) and garnet red look awesome and kelly green just so so. The top layer is then a clear transparent glass with clear fractures and a rainbow iridescence.
The hardest part of the piece is cutting the top piece of glass. Because it has many irregularities on top, I score it on the bottom. But even so, I tend to waste glass as I am trying to get a good straight cut.
But the piece fires easily and usually the edges round nicely so I only need one firing and then a slump into the mold.
As an aside, I did try using this clear fractures glass to make a jewelry piece and it just didn’t pop the way the plate does. I think the piece is just too small.