It was the plaster!!! The picture once again is lousy though. The Phoenix is also engraved to give it a better outline and the white glass doesn't look white. In fact none of the colors look right. Maybe I should take a course in digital photography.
The phoenix is really pretty.
For your photography, maybe you need to build yourself one of those nifty light table, like you showed me in your book (the one that you use wax to stick the unsoldered pieces to was very interesting). That will let you get even lighting through the glass, which will certainly help improve the presentation in the photos.
I can help you with some photography tips--there's a powerpoint presentation from a workshop I gave on digital photography last fall. It's linked on my weblog in the right hand column.