Look on the bottom or around the base; Waterford usually marks their crystal there if possible.
The Complete Guide to Waterford Crystal
Waterford updated its most popular pattern in Add 2 tablespoons of white vinegar or ammonia. My account Sign in Create account. Photographs may not capture acid stamps that are visible to the naked eye. To contrast, do the same with a piece of regular glassware and listen for the dull thud that comes when you tap it. It seems like very plain glass and seems to be a roughly made item.