Hayley, when I tried that I got reduction stripes down the bead! It was the weirdest thing I have ever seen!
So this is that bead, but after I got stripes (that then got erased when I passed it through the flame & another stripe appeared) I just put it about half way up in a slight reduction flame for a few seconds & this is what I got. It actually looks like metallic marble, if anyone has been up the Empire State Building & seen the floor tiles up there it reminds me of those. I wish I could get a video of what I did & how it ended up like this, maybe on the weekend when Eddie's home ...
ETA - the bead is metallic, although it doesn't really show up in the pics.