Thanks for your help. I have several nice pieces that I believe are cut glass, one shallow bowl with a J Hoare & Co mark. If the testing idea is correct to us uneducated folks, the bowl has a definite "poke" when you touch the outside and a true ring when struck with a pencil..... don't laugh...I was a little surprised at the first response, maybe just a bad day. I did wonder about being able to find the mark from Corning but not anything on the other pieces. It wasn't noticeable the first couple of times I looked but when I turned it a certain way the mark came out, kinda like a hologram. Is it unusual not to have some kind of mark on cut glass pieces? Thanks again and I am posting a picture of that bowl just for the heck of it....