Geometric shape
A shape that fits into mathematics (circle, square, rectangle, triangle)
Glass-like substance fused on to the surface of pottery during firing in a kiln. The glaze forms an impervious coating over the pottery.
             The name for images or lettering scratched, scrawled, painted or marked in any manner on property. Graffiti is any type of public markings that may appear in the forms of simple written words to elaborate wall paintings.  Graffiti can be used as a gang signal to mark territory or to serve as an indicator or "tag" for gang-related activity. The controversies that surround graffiti continue to create disagreement amongst city officials/law enforcement and graffitists looking to display their work in public locations. There are many different types and styles of graffiti and it is a rapidly developing artform
Cement which is put into the spaces between tiles in a mosaic
gsm means "grams per square metre", which indicates the weight of paper or card