DO NOT ENCASE this glass. It just won't take it. I can't speak for the other streaky colours that came out at the same time, but on the left is a bead with only two glasses in it, Vetro 989 and Vetro Clear (the same clear I have successfully encased many other beads with.)
Below are two more beads, made with 989, and not encased.
Very pretty glass, but if all you can do with it is wind off spacer beads, it limits it's usefulness (although, doesn't eliminate it.) You could use it as a great accent bead for a set.
BTW - the streaky centre of this glass is more greyish than creamy.