[Lady Heron]

And does anyone have much experience with trying to cut it with a Dremel? I know they polish it really well, but if I try to cut into it, and I going to release a spray of powder with microfine cutting edges?

Masks....when you go to those glass blowing sites look up safety mask if you are going to cut glass.

[goat granny]

More important than a mask (i have never used one) is to had safety glasses when cutting and grinding to shape. Working with glass is easy with the right equipment, but it takes a lot of practice.