A diamond’s cut is regarded as the most complex and important quality for the stone to possess and ultimately determines its brilliance. It remains a common misconception that a diamond’s cut refers to the shape of the stone. However, the shape and cut of a diamond are two separate and differing properties. The cut of a diamond changes its angles and depth, as the cutter attempts to physically alter how light passes through the stone. A superior cut will create a mirror effect within the diamond, with light entering and then reflecting back through its face, resulting in a great level of fire and scintillation. A poor cut occurs when a diamond ends up either too shallow or too deep, which negatively affects the passage of light through the gemstone. A shallow cut produces a short, stumpy diamond which light will pass straight through the bottom of. A deep cut produces an overly elongated stone that allows light to escape from the side. A cut can be graded as one of the following: Ideal cut – Maximum brilliance is achieved with this near perfect cut. A stunning and rare cut. Very Good Cut – Reflects nearly all of the light entering the diamond, allowing only a minimal amount to escape from anywhere but the face. Good Cut – Most of the light will be reflected however there is now a slightly noticeable difference in the fire and brilliance between this stone and higher quality cuts. Fair Cut – An adequate amount of light will be reflected through the face, however the difference between this cut and a higher quality one are now very obvious. Poor Cut – This diamond will be cut either overly deep or overly shallow and the strange length of the stone will standout. It will reflect virtually no light whatsoever.