By 1881 Louis Comfort Tiffany and John La Farge had patented methods of creating a milky whiteopaqueglassthat contained flashing hits of color in its depths, like fire opals (Zukowski, 2006). Photo of Newport Congregational Church has intact opalescent glasswindows and decorative features by La Farge, Newport, Rhode Island, 2021. (Zukowski, 2006)
