Vitrolite — a structural glass popular in art deco and art modern styles in the 1920s and 1930s.
Vitrolite hasn’t been produced since 1947.
The versatility of pigmented structural glass contributed to its popularity. Not only could the material be applied to both the exterior and interior, the glass could be sculptured, cut, laminated, curved, colored, textured, and illuminated. Often applied directly over existing architecture to remodel older buildings--as well as in new construction--a veneer of pigmented structural glass had the ability to define a building's architectural character as new and up-to-date.