I think this is the biggest bead I've yet made. Though hollow inside, it's still pretty heavy. I made it, coreformed, on a Hothead torch a few years ago.
Colors in glass are determined by metals suspended within the glass. Gold pink is the most expensive soft glass color I can think of because there is real gold in the glass! It is one of my favorite glass colors, vibrant and lovely, though unpredictable because the dispersion of gold is often inconsistent throughout each glass rod.