gemological institute of America

Diamond Certification by the Gemological Institute of America (GIA)

The Gemological Institute of America (GIA) is the most revered authority for anyone serious about diamond quality. With a history spanning more than 90 years, GIA has earned its reputation by setting high standards in diamond grading. This long-standing institution has shaped the industry’s grading systems. It provides a level of transparency, authenticity and trust that buyers have come to rely on when making significant investments in diamonds.


Founded in 1931 with the mission to protect consumers, GIA has been a pioneer in gemology since its inception. Over the years, it has introduced groundbreaking methods and technologies for diamond grading. From developing the first internationally recognized diamond grading system to pioneering gem identification techniques, GIA has continually evolved. Its commitment to research, train and educate has made it a trusted authority in the gem and jewellery industry, thereby, setting the industry standards for diamond certification.


GIA is not just the benchmark in diamond certification, it’s a comprehensive hub for gemological services. GIA has 14 locations spread across 13 countries. With 10 campuses, 9 grading and gem identification labs, 5 laboratory take-in locations and 4 research centers, GIA has a presence in all the major gem and jewellery centers across the world. GIA has trained over 300,000 students since its inception.

Parameters for Certification

GIA employs a comprehensive and meticulous approach to diamond grading. The institute focuses on the “4Cs” – Cut, Clarity, Color and Carat, but goes beyond these basic parameters.

Each diamond is examined by a team of expert gemologists who use state-of-the-art equipment to ensure the most accurate grading.

Sample GIA Report

A GIA report is a comprehensive document that serves as a blueprint of the diamond. It includes detailed analysis, measurements, proportions and identifying characteristics. The report also features a plotted diagram of the diamond’s inclusions and a table indicating its grading based on the 4Cs.

A GIA certification is a testament to a diamond’s quality and authenticity. Understanding the parameters and the grading process empowers you to make informed decisions. Soham Ghosh International is committed to offering GIA certified diamonds, ensuring your investment is beautiful and secure. As a luxury export house, we offer an expansive inventory of 50,000+ GIA certified diamonds that have undergone rigorous evaluation to meet GIA’s quality and authenticity standards.