I went searching around, and did find that Corning made glass pots and pans, including skillets. They seem to be discontinued, although I found a couple on Ebay. My sister in law had a set of this in the late 1980s. While she was boiling something (on a gas flame) in a saucepan it suddenly exploded - very fine slivers of glass in a 4-foot radius, with hot water all over. I don't know if she knocked it, or if there was any triggering event. She trashed the whole set. Before that happened, she was very happy with the pots - heat transfer, and thus the rate things heated up, was very good. The ones I remember were all amber-colored.