noun🔗ShareCalcédoineA form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally."The artisan carefully polished the piece of chalcedony until its milky translucence caught the light beautifully. "L'artisan a soigneusement poli le morceau de calcédoine jusqu'à ce que sa translucidité laiteuse attrape magnifiquement la lumière.geologymineralmaterialsubstanceChat with AIVocabulary GamePractice Reading