Confused, don't see a pic. Mod: Pics added see above
However it doesn't sound like a St. Clair, unless it is a Tom St. Clair weight. Typically most St. Clair collectors think of Joe, Bob (and Maude), Ed, Paul, and Pop when the St. Clair name is mentioned. The "original" St. Clair glass essentially ended in the late 80's and we now have Joe rice carrying on the St. Clair tradition. Tom St. Clair, to my knowledge, has never really caught on with most collectors.