About

The Technological Institute of Gemology was designed from the ground up to bring precision, consistency and transparency to fine jewelry and diamond grading. Using cutting-edge technology we are significantly reducing the reliance on subjective grading by gemologist experts. Objective grading can only be achieved by methods that eliminate bias and by embracing measuring instruments and tools to sort, analyze and deliver the same result every time. This is the mission we strive to achieve with research, testing and forward thinking.

Learn more about our grading process and certification services.

For inquiries about grading your diamond and jewelry or if you've received a TIG certificate and have questions, please don't hesitate to contact us.