Both in my Etsy shop, although the first one is no longer available. :o) (Thanks, Crystal!)
I've been experimenting with finely ground glass lately. It's interesting. Somehow, it's not sharp, but it does make interesting texture as well as making the painting super-uber sparkly (which is, unfortunately, absolutely impossible to capture in pictures.)
I did notice just today that there is something extra special about the way morning sunlight reflects off the glass. It's brighter and MUCH more sparkling than I'd even realized. I love the different colors of light. I should wake up earlier more often. (Yeah, right.)
I find it sort of funny that my mom used to make stained glass windows, and now I'm adding glass to my paint. Madness.