Too, I like grey glass too. The people at one of my favorite haunts, Bedrock Industries, told me it's just not a popular color.

I looked at Spectrum glass and found something that may be of interest - hope it helps. Susan

Here is a link that might be useful: Spectrum glass

Hi toomuchglass, how about substituting something besides glass for the gravel, perhaps even real gravel?
I just finished working on a frame I'll be using on a mirror. I used all sorts of jewelry pieces on it as well as spoons, and varies knick knack keepsake items that I had and it got me to thinking of all the possibilities for mosaicing.

This past weekend I went to a flea market and bought anything that I could find that were in bunches. For example, one person had a pile of radio knobs.... think outside the box, it'll add interest to your piece!

you can find black aquarium gravel on ebay.

I'll try that on my next project . I don't want to experiment on a custom order , but it sounds like it might turn out.