Research Collaborations & Support to Academia

Since GIA’s founding in 1931, our mission has been to protect the public trust in gems and jewelry. Part of fulfilling this mission means conducting extensive research on gems through acquiring gem samples and conducting thorough scientific investigation on these samples through cutting-edge instruments. Our goal is to share our findings widely, including with the jewelry trade, scientific and academic communities and the general public.

The following list showcases recent articles authored or coauthored by GIA scientists that have appeared in professional publications. Coauthored articles were written in collaboration with researchers at universities or other institutions. These diverse articles represent pressing topics that our scientists are currently investigating, including knowledge that addresses current gemological challenges.

All Gems & Gemology articles are available for download on the GIA website. Articles from other journals are often available in university libraries or from the journal publishers. At GIA, we are privileged to have access to a large range and quantity of gems often unavailable to other scientists. We are thrilled to be able to share the insight obtained from these gems with fellow scientists and the public at large.

Enumerating Diamond Cuts

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The Transformation of Diamond Cut Quality Grading: Where Are We Now?

GIA researchers trace the history and transformation of diamond cut grading, highlighting scientific breakthroughs that are reshaping how cut quality, brilliance, and visual performance are evaluated.

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New Edition of Tillander’s Diamond Cuts in Historic Jewellery 1381–1910

An updated edition of Herbert Tillander’s book is now available.

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Filled Natural Hollow Heart-Shaped Pearls

Examination of four heart-shaped pearls reveals cavity filling and plugging to improve durability.

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An Unconventional Bead Cultured Saltwater Pearl

A semi-baroque saltwater nacreous pearl presents identification challenges in the Mumbai laboratory.

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Dark Red Tantalite Crystal in Greenish Blue Sapphire

The blunt termination of a red manganotantalite inclusion displays a striking contrast against a greenish blue sapphire.

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Hanabi in a Conch Pearl

A pink oval conch pearl displays firework-like flame patterns.

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Assembled Black Imitation Pearl

An undrilled black bead is identified as an assembled imitation pearl made from shell fragments.

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Fingerprint Pattern on a “Hammered” Pearl’s Surface

Spiral patterns of nacre platelets observed on the surface of a non-bead cultured pearl are reminiscent of fingerprints.

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Fracture-Filled Diamonds Detected in Mounted Jewelry

The Mumbai laboratory reports on a jewelry submission containing fracture-filled diamonds.

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Blooming Bouquet: Thin Films in Russian Emerald

Colorful thin film inclusions are captured within a Russian emerald carving.

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“Bamboo Forest” in Colombian Emerald

Dense tube inclusions in emerald create a scene reminiscent of a tranquil bamboo forest.

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