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

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

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

GIA studies a selection of rough and cut garnet from a new source in northern Vietnam.

GIA offered a variety of hands-on sessions for attendees during the Converge conference.

Near-colorless heulandite crystals in an Ethiopian opal resemble the segmented bodies of worms.

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

An overview of more than 30 posters presented at the Converge conference.

A large faceted cuprite is examined at the Carlsbad laboratory.

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

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

Armenite is submitted for the first time to the Carlsbad laboratory.

Presents a comprehensive analysis of the gemological, spectroscopic, and trace element characteristics of a set of Shaanxi emerald samples based on standard and advanced gemological methods.

An overview of the Winter 2025 Gems & Gemology content.

A summary of presentations from 24 industry-leading experts at Converge.

An aquamarine crystal from Pakistan contains a pseudomorphic quartz inclusion.

Reports on a new source of primary gem-quality sapphire from Montana, comparing its inclusions and trace element chemistry with those from secondary sources in the state.

A photo tour of the GIA Museum’s latest exhibit featuring extraordinary crystals and gems central to the cultures of southern Asia.

An overview of the Winter 2025 Gems & Gemology content.

Investigates deposits known for producing multiple gemstone species and the conditions that create their distinct geological settings.