Moorey was unconvinced the artifact was indeed a vase , mentioning that Selimkhanov , after his analysis of the Tello object ( published in 1975 ) , " attempted to relate the metal to Transcaucasian natural antimony " ( i.e. native metal ) and that " the antimony objects from Transcaucasia are all small personal ornaments . " This weaken the evidence for a lost art " of rendering antimony malleable . "