We're searching for a company which can provide us with gemological services including basic grading and analysis for each diamond. Our managers have found so many good reviews about gsi certification. They provide the top level service and I can say they are truly dependable. We had no nuances in our cooperation. GSI has a modern lab, where they founded foolproof cutting edge technology. Every diamond is graded to the highest standards: unmatched and accurate. Specialist’s tests and grades are accompanied by reliable documentation. I can recommend you to ask them for help.

Yes, my dad also work with GSI. This truly reliable and well-known company! is really?