Birague, Clement

, an engraver on precious stones, was born at Milan, but exercised his art principally in Spain about the middle of the sixteenth century. He was the first who discovered a method of engraving on the diamond, which before was thought impenetrable by the graver. The first work he executed of this kind was a portrait of don Carlos the unfortunate son of Philip II. He also engraved, on diamond, the arms of Spain as a seal for that prince. 2