Ha. Bet you would never guess that this:
turns into this!
Yes, that's right - what appears to be a black core with a topaz overlay in the first photo, works up to be a streaky dark ivory with lapis blue stripes.
The topaz lightens and becomes opaque, and the black is apparently a dark blue. The result is striking and definitely not "what you see is what you get." This is stash of Vetro glass - so this is it. You'll not see this again.
Jean at Nortel, and I suggest you don't linger if you want any - because everyone I have shown these to is calling as we speak to order theirs.