👉 Biproning, also known as a pentagonal prism, is a type of crystal structure that combines two or more regular polygons into one. These shapes are often used in various forms of art and design, such as jewelry, architecture, and interior decoration. The term "biproning" comes from the Latin words "bipon" (two) and "rings" (prism). It is a term that refers to an arrangement or configuration where two or more polygons are