pietra duraPronunciation: /ˌpjɛtrə ˈduːrə/Definition of pietra dura noun [mass noun] pictorial mosaic work using semi-precious stones, typically for table tops and other furniture: panels of pietra dura [as modifier]:a Florentine pietra dura topOrigin: early 19th century: from Italian (plural pietre dure), literally 'hard stone'