Iridescent glass has a surface treatment where metallic oxide is bonded to the glass while the surface is hot. This causes the surface of glass to reflect a rainbow like color which gives a metallic sheen appearance. Iridized glass similar to dichroic can be textured, pattern, or clear. It can also be capped or uncapped, both have a beautiful effect on whatever the piece. In my terms, iridized glass gives any piece a little sparkle. When I add iridized glass to streaky glass or even plain white glass the piece is more elegant.
So now you know another one of my favorite types of glass - Iridescent.
As always, please feel free to email me with any questions you may have.