7 Key Differences Between GIA and IGI for Lab Diamonds

7 Key Differences Between GIA and IGI for Lab Diamonds

If you’re choosing a lab-grown diamond, certification is your confidence check. Do lab-grown diamonds come with GIA or IGI certification? Yes—both GIA and IGI issue lab-grown diamond grading reports. GIA’s reputation leans toward conservative, globally recognized grading; IGI is widely used across the lab-grown retail channel for speed, availability, and value. This guide breaks down how each lab differs on grading approach, report content, turnaround, and market impact so you can align certification with your budget, priorities, and peace of mind.