How GIA Grades Diamond

For more than 50 years, diamond buyers have relied on the accuracy and impartiality of GIA grading reports to validate a diamond’s quality. As GIA establishes more laboratories to serve the needs of diamond buyers everywhere, it invests heavily to ensure the consistency of its standards and grading practices worldwide.

Like all GIA Laboratories, GIA India operates under a set of core principles to safeguard the integrity of every report it issues. The goal remains to provide all consumers and jewellery professionals with the benchmark standard they’ve come to expect from GIA.

Equality: All diamonds – and all customers – are treated equally

Regardless of size, origin or ownership, each diamond undergoes the same rigorous testing and grading procedures as all others. There is no preferential treatment for either the diamonds or owners.

Objectivity: Graders don’t know whose diamonds they are grading

Diamonds pass through GIA laboratories anonymously and are distributed randomly to highly trained graders at each step of the grading process. This ensures the most objective grading results possible.

After verifying all items submitted by a client, each diamond is placed in a transparent storage case and the owner references are removed.
The case is assigned a bar-coded label with a unique internal identification number that tracks it anonymously through the grading process.
Client information is masked in the software the graders and gemmologists use to enter assessments.
The Inventory Control Department in each laboratory serves as the hub for operations. Diamonds are distributed randomly to and from this department between grading steps. It is impossible to predict who will grade any diamond.
Frequently, items submitted in one location are transported to other locations for grading. GIA does this to optimize efficiency and quality control.
A GIA report from any laboratory looks the same as any other report of its type, regardless of the location that generates it. And while the report will likely be printed by the location that completes the grading process, the content may come from multiple locations.

Accuracy and Consistency – GIA India reflects GIA’s ongoing worldwide investment in research, staff, and technologies

A leader in gemmological research, GIA is often first to detect the latest diamond and gemstone treatments and synthetics entering the marketplace and uses its findings to develop ways to identify them. All GIA laboratories benefit from and apply this research as they assess gemstones.
GIA laboratories maintain rigorous calibration standards for all lab instruments. Depending on the device, frequent calibrations are done to maintain consistent results from one location to another.
Every item submitted for grading is tested and screened at multiple steps during the grading process and every GIA lab follows the same screening policies and procedures. If a determination is inconclusive at one lab location, the gemstone will be routed to another for further testing.
A global database captures hundreds of data points for every diamond during the grading process. By providing GIA researchers with the data to detect emerging trends in treatments, this database gives GIA the ability to pinpoint a diamond’s exact location during the grading process; it also monitors grader performance.
Control stones that represent diamond grading standards also move anonymously through GIA’s worldwide grading pipeline. This constant stream of quality control stones, randomly mixed with client stones, lets GIA track the uniformity of its practices.
Teams of system quality analysts who represent GIA’s most experienced graders and its highest ranking management regularly rotate to GIA locations worldwide to train staff and oversee to ensure adherence to consistent practices.

Integrity and Security – GIA rigorously monitors its grading processes to protect against any breach in conduct or security

An independent, third-party firm issues Global Compliance Reports based on the data collected for each diamond. The reports cover things like grader-to-client frequency and client servicing time, which allows the lab to spot potential breaches in conduct or security.
The database, a permanent repository of information on every diamond graded by GIA, is also a resource to track a lost or stolen diamond or report.
Every GIA employee around the world is required to abide by a Code of Conduct designed to protect against conflicts of interest. This zero-tolerance policy prohibits the acceptance of gifts from clients and vendors.
GIA’s Ethics Policy and Code of Conduct is published on the Institute’s website. Any actual or suspected instance of potential misconduct can be reported anonymously from this link. All complaints are rigorously investigated.

How to Submit Stones?

Thank you for considering the GIA India Laboratory for your grading and identification needs. GIA is very pleased to introduce its newest location in Mumbai as an efficient and convenient way of submitting your items to GIA for service.

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