Most windows were fabricated using America Opalescent Glass, opaque, multi-colored glass, and American Cathedral glass, transparent colored glass with a mechanical finish imparted by a roller. 

Some of the antique glass is "flashed, " meaning that the base glass color (usually clear) is fused to another thin layer of paint. 

This enables the glass artist to sandblast or acid etch one of the layers to create unique color shading and effects in a single piece of glass.  The paints on the glasses are executed using both the traditional trace and matte technique of glass painting and the enamel-based process of glass painting.  There is also some use of silver stain in creating the ornate gold in some of the backgrounds.