This is one of the most unusual pieces I've run across lately. This fabulous & rare 19th Century (1860s) "Karlsbad" souvenir pendant has a unique pietra dura or hard stone 'specimen' mosaic on one side.
The reverse side has a photograph of similarly clothed women (who might be in nurses uniforms) in the foreground with a fountain and differently clothed people in the background.
The pendant is in excellent condition, measures 3/4" in diameter and has a gold-toned rim and eye hook for stringing through a chain. (T)