Thanks. Originally, it started out as a thank-you card for someone of musical inclinations. And the first picture was the one I used. But I also love music, and the second was (re-)inspired by a piece of music I was listening to at the time. The fascination for portraying crytal/glass comes in at a pale second. (A very small bit of irony here...I was working on putting it on the front page, when I read your comment. )
The fascination to depict glass/crystal is strong. That was a part of the concept for the first...the second is including the colors some music invokes, as well. I have a crystal bowl I purchased some time back that I may fill with water/rocks/marbles/who-knows-what, and see what I can come up with.