Cathedral Glass: Transparent glass that is monochromatic with smooth or textured surfaces.

Stained Glass: Term used to describe any colored flat glass or any object made of such glass joined by metal strips. Originally, colored or clear flat glass cut to fit an artist’s design on which details were painted in pigment with a brush. The glass pieces were then heated in a kiln or oven to bond the pigment to the glass surface. Most religious windows from medieval times to the 20th century were made in this way.

Opalescent Glass: Semi-opaque, with a milky appearance. It can be one solid color but generally is a mixture of two or more colors with streaks and swirls.

Painted Glass: From the 14th century in Italy, translucent oil paint was applied to stained glass to enrich the range and quality of colors.

Rondel: A mouth-blown piece of glass that has been spun into a circular shape, often irregular. They were sometimes incorporated into leaded glass artworks. Machine-made facsimiles are called “pressed rondels”.

Light Screens—Frank Lloyd Wright:
From 1885 – 1923, Wright designed more than 4500 windows for 160 buildings. He used predominantly clear glass and abstract geometric shapes to create transparent glass screens between inside and outside environments. He used the term “light screens” to describe the shoji screen effect.