Etruscan jewelry at its best is not easily distinguished from the Greek, but it tends in its later forms to become florid and diffuse, without precision of design. The granulation of surfaces practised with the highest degree of refinement by the Etruscans was long a puzzle and a problem to the modern jeweller, until Castellani of Rome discovered gold-workers in the Abruzzi to whom the method had descended through many generations. He induced some of these men to go to Naples, and so revived the art, of which he contributed examples to the London Exhibition of 1872.