Nice Collection of Crystal Glass, Sorry I have pop in this thread a couple of times but have been sick the last couple of days. Not very good a thinking and writing when you are not well. First you have basically three grades of Glass. Lead Crystal, having 24% lead content, Crystal Glass has some lead 1% to around 18%, Then you have glass. A simple tap with a fork will usually give you a good ideal of What kind of Glass you have. Run around you house and tap a few and quickly you will hear the difference. Real quality lead Crystal will ring beautiful and have substain for several seconds and the Tumbler in you cupboard will have a dull thud. Now you have the processes. Pressed Glass, Cut Glass, and Press Cut Glass, and Handblown too. Pressed Pattern Glass has smooth edges around the pattern, much as mart mentioned, Cut glass which the pattern is actually Cut into the glass will be shaper feeling, not sure it will cut you but you will feel the difference. Press Cut is a combination of both pressed pattern and cut much like the Rose Bowl you have. Of couse let us not get confused with PresCut. PresCut was introduced by Mckee Glass in the late 19th century, it is pressed Glass made to look like Cut Glass, was made for the poorer folks like me. Keep a eye out for pieces marked with PresCut, these are Mckee and can be moderataly Valueable. The biggest issue with Pattern glass is it has been made since the mid 19th century by the tons, even today names like Mikasa, Gorham make fine pieces of pattern Glass. So it can be hard to find the right pattern and name and then sometimes you have to look hard because patterns have repeated. I have been finding under most cases with pattern glass, knowning the maker will not help much in the value, the look of the piece and quality of Glass is more important. Age however can make a difference, if you can prove you have a EAPG (Early American Pressed Glass) Piece that can help the value, or even EAPC (Pressed Cut). Sorry for the long winded post but this can get kind of confusing at first but will make sense with time and lots of touchy feeling work. Now let me give a few notes on the pieces. Coming next