Actual Glass - - - NOT " Milky White Acrylic "(Plastic) that comes up on Amazon !
Smooth on One side / Ridge Lines on the other , maybe for troweling in place , masonry , etc.
For old (1930’s) kitchens and baths in high end antique homes .
** Vitrolite is a type of pigmented structural glass, also known as structural glass or vitreous marble, that was popular
in the early to mid-20th century, particularly in the Art Deco and Streamline Modern architectural styles.