The term 'GEM's Cut Surface' refers to the shape of a gemstone after it has been cut and polished. The most common type of cut is known as a FACET, which is a five-letter word that is often used to describe the surface of a gemstone. Faceting is the process of cutting and polishing a gemstone to create a symmetrical shape with multiple flat surfaces, or facets. This process is used to enhance the beauty of the gemstone and to maximize its brilliance.