GRS Seminar and Launch of "Magnificent Green" Book

We cordially invite you to our special GRS seminar event in Bangkok in honor of our CEO and founder Dr. Peretti’s 60th birthday. In celebration to his gemological contributions to GRS, we shall be hosting seminars discussing a range of gemological topics and showcasing our latest book project on Colombian Emeralds. It would be our pleasure to welcome you and your guest to this exciting event.