Samples of old crystal patterns are available at Replacements.com. This site hosts a comprehensive list of patterns for crystal that includes the pattern name, stem number and manufacturer.
Site visitors can click on a pattern to view an illustration and detailed information such as when the pattern was discontinued, a full description with updates and how to order, should a replacement piece be desired. Replacements.com carries over 425,000 patterns and descriptions for china, silver and collectibles as well as crystal. Additionally, site visitors can search designs by either manufacturer or pattern, in an extensive alphabetical list.
Replacements.com also offers information on how to repair damaged crystal.