Jim Sutterfield now in Green Valley, AZ and at home this spring in Corning, NY has some interesting comments on color.
I have certainly enjoyed the various inputs on color and glass properties and processes. Must say I don’t see anyone with actual glass production experience joining in. I still say the only way to know actual colors is to make sample melts with batch materials we can still obtain.( I/e iron scale from main plant would be somewhat difficult.). Pot melting is easier to reproduce conditions in an electric furnace than would a direct fired modern furnace. I still think we should do it.
I have been working with a flame working instructor with Sonoran Art Glass here in Tucson to make some stoppers. He has suggested that he could make them from actual Steuben broken pieces. Hence my problem— I don’t have chipped, broken stock here. My source will be in Corning this summer so if anyone has samples for recycle, please let me know.

Next, Dick Stark of Bethesda, MD responding to Rande Bly’s comments on a color eye and gem stones says:
I need to have the examples side by side to discern gems…. with glass minute shades seem trivial….. in Webb and Woodall shades of amber thru brown to purple, puce, raisin, cognac etc can all present in the same object.