Things You'll Need
Instructions
Hold the glass to a light source and look for the acid-etched Waterford name in gothic script on the underside of the glass. This may be a difficult task. If successful, it results in easy identification of Waterford glass.
Examine the different aspects of the glass. There are certain patterns and features specific to Waterford glass products. For example, pieces produced before 1830 have a smoky, bluish gray color, which is lacking in later pieces.
Cross-reference the pattern of your glass with online guidebooks of known Waterford glass patterns. This will require extensive research, but is the only available identification tool if a logo isn't present on the underside. If the pattern is identified in the guidebooks as a Waterford, you can safely assume it is authentic.
Take your piece into an antiques store that specializes in collectible glass pieces. An expert will be able to examine your piece and determine whether it's a Waterford product.
Upload a picture of your glass piece onto the Internet. There are numerous forums online where experts will be glad to help you determine the maker of your glass. To the trained eye, a Waterford piece can be easily distinguishable.
Find an appraiser who will determine your piece as a Waterford. Due to the fee that appraisers charge, this should be a last resort when all other methods of identification have failed.