Pros : Beautiful, opalescent, yet retains its transparent nature.
Cons : The darkness of the mottles and rust brown is overwhelmed by the off white. My piece, and subsequent pieces were mostly white at first glance, but to be fair, the mottling and some of the rust and brown did show through the white outer appearance when it was backlit. A darker copy of this would be nice.
Other Thoughts : Glass is whiter than expected, although I will surely use this for designs with dogs and wild cats. Pieces that need something to show reflection of light would be good, as the white surface and reflective nature are definite pros for this one.