But there's a couple of factors that inhibit me from working with it more. Firstly, it can get pretty pricey. Since it has an ancient source, the material is finite. It is currently excavated in Roman glass bottle dumps in Afghanistan. Another thing that keeps me from using it more is that it is very fragile. And while I love the beauty of fragile things, I like things that can take a heavy beating. Sure, it has survived for thousands of years, but that was under layers of protective earth and not dangling from the human body. The iridescent finish is also pretty delicate and experiments with clear coating it have been less than awesome. ("Less than awesome" translates as disasters that ate up all the rainbowy flash in a few sprays.)
So I set out to work on my own experiments to create similar looking pieces in polymer clay! I'm getting there, little by little.
In my first experiment, I made texture sheets and used those to texturize some nuggets that I made. I shaped them to look like river stones. I was happy with the texture and I was happy with the iridescent finish. I used a variety of opalescent paints with fine interference pigments. I was also happy with the alternative shape. Usually it comes in curved elongated ovals.
My problem was opacity.
They didn't look like glass. They were still very cool looking and I'm sure I'll use them in some project, but they just weren't "right" yet.