The ZGL diamond certificate provides a reliable and accurate documentation of a diamond’s identity and grade based on the internationally recognized diamond grading system. Using state-of-the-art equipment, each diamond is analyzed by several gemologists in order to provide the most accurate description of the diamonds quality and characteristics. The carat, color, clarity and cut-commonly known as the 4c’s of each diamond are clearly stated on each diamond certificate. Additional grading characteristics such as finish, girdle, culet and fluorescence are also detailed on the certificate. A diagram of diamond displaying any inclusions is also included on the certificate.