Encased under an oxidizing flame gives transparent golden amber veils with a faint bluish reflective quality and you can get a mirroring iridescence on the surface. Inside outs can give anything from amber to steel grays. Under neutral flame, surface colours can get a bit darker.
This rod is of Silver Tears, made by Momka Glass in Washington state USA as a borosilicate glass rod. Each rod will vary between 5-7mm dia and will be 20" (510mm) long.