2 Agate Burnishers Bezel Gold Silver Leaf Tools Bookbinders &#9989; Essential tools for calligraphers, jewelers and bookbinders both professional and hobbyist. &#9989; These tools are designed for burnishing gold leaf and other surfaces to a high luster. &#9989; Natural agate stone burnishers are the perfect tool for metal clay work, applying gold and silver foil or Keum-boo applications.