Favrile Glass

Frelinghuysen said those included the modernist entrance hall, dramatic stairway, gold mosaic ceilings, Favrile glass vases and a trompe l’oeil temple on a stair landing that combine to form a unified ensemble.

On it sits a Tiffany Studios weight balance table lamp made with white turtle back glass and iridescent favrile glass tiles.

The firm, which operated from 1880 until Tiffany's death in 1933, was celebrated for its Favrile glass, an opalescent glass with swirls of color variegation and three-dimensional effects that Tiffany patented in 1881.

Similarly impressive is a sizable, relatively austere leaded favrile glass window festooned with magnolias and wisteria by Louis Comfort Tiffany at Lillian Nassau.

His vision was limited by the few kinds of glass commercially available, so he invented and patented his own brand, called Favrile glass.