GIA and IGI are two of the most respected institutions for diamond grading. Although GIA tends to be more popular in the United States, IGI is highly regarded across Europe and Asia. Furthermore, IGI certifications are generally faster and more cost-effective. A diamond represents not only eternal love and perfection but also a significant investment. Before buying a diamond, learn about the certification. Click here to know more about the certification. Therefore, when purchasing a diamond, it’s essential to feel confident about your choice.