Established in 1991, GIE Labs has earned a trusted reputation in gemstone testing and certification. Our growth is driven by rigorous research, purpose-built methodology, and an expert team of highly qualified gemmologists and diamond graders.

We help gem lovers, traders, and retailers with clarity on enhancements, origin, treatments, and comprehensive analysis tailored to stones of unique importance. GIE certificates instill confidence in both buyers and sellers regarding authenticity and quality.

Even if you don’t have technical knowledge of gem specifications, our reports focus your decision on what matters most — clearly and reliably. That’s why GIE Labs is the preferred partner for accurate, impartial, and timely certification.