This blue color is so beautiful! How was it produced?
Fascinating effect, isn't it? Frederick Carder trademarked his iridescent "Aurene" glass in 1904. It was called Aurene because it shone like gold! To achieve this iridescence, metals were incorporated into the glass and the heated in an oxygen-starved environment. Then the vessel was sprayed with tin salts dissolved in water.
Many manufacturers in this period were interested in creating iridescent glass. If you like this, I suggest you visit the Luce Visible Storage and Study Center on the 5th floor. There you can see pieces from Tiffany’s “Favrile” line, as well as a beautiful piece of Weller-Sicard glass.