I've mentioned 'striking' glass before, which requires fancy flamework and a large dose of luck. This bead is simply clear, with a layer of silver foil followed by wraps of a striking glass called Chalcedony. On this occasion I was lucky and I got a myriad of warm, autumnal colours...and even some blues and greens!
The second bead was made with transparent grey, again wrapped in silver foil, with stripes of a mottled brown-grey glass called Sediment. The result is wonderfully organic, but with the surprise addition of some silvery blue bits on the ends.
You will find them on Etsy over the next day or so.