The World's Most Trusted Gemstone Labs
The Big Seven – Global Pillars of Gemstone Certification 1. GIA – Gemological Institute of America Founded: 1931 Headquarters: Carlsbad, California, USA Website: https://www.gia.edu Specialty: Diamonds, Colored Diamonds, Pearls, Gem ID Why It Matters: - World\'s most recognized gemological institute - Invented the 4Cs grading system (Cut, Color, Clarity, Carat) - Primarily known for diamonds and pearls, but also issues...
Read More



