Cer-Vit C 101 was used to form large mirror blanks (158 inches (4,000 mm) in diameter) that were used in telescopes in several places, including South America, France and Australia.
In addition, Cer-Vit materials were used to make stove tops, cook ware and aviation applications, but never commercialized.
Today, glass-ceramic products such as transparent mirror blanks and stove tops, and cookware are manufactured and in daily use.
These products include trade names of Zerodor, Hercuvit, and Pyroceram, most of which have low or zero thermal expansion, which allows them to be exposed to rapid temperature changes or localized heating or cooling.
At Mount Lemmon Observatory, two 1.5 meter diameter telescopes have a Cer-Vit glass mirror.