hardstone From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounPrecious stone or semi-precious stone used to make intaglio, mosaics etc. Related wordsSynonymstool stonewhinstonestonefoil stonepietra duracornstonetoolstonetilestonepotstonedimension stonehonestoneprecious stoneragstonepitchstonesunstoneseal stone References Wiktionary — hardstone Wikipedia — hardstone