Blackstone Hall Tiffany-Style Stained Glass Window. More than 300 hand-cut pieces of authentic art glass and 11 cabochons encased in glazier’s lead. Nearly a yard of sunny gold and cobalt organic elements shine in this unique, vertical stained glass window that pays homage to the classic Tiffany style. Each individually hand-cut piece of art glass and cabochon is copper-foiled and encased in glazier’s lead. Display it within a window frame using the scrolled bracket included for hanging. This is authentic, hand-crafted art glass; variations of texture and color are part of the process.