A precious cat’s-eye boulder opal from Australia is examined in the Carlsbad laboratory.

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

A snuff bottle submitted to TULAB as jadeite jade is identified as a dolomite aggregate with fuchsite.

The Carlsbad laboratory reports on a rare submission of orangy red translucent friedelite.

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.

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

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.

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

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

A large faceted cuprite is examined at the Carlsbad laboratory.

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

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.

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.

An aquamarine crystal from Pakistan contains a pseudomorphic quartz inclusion.

Examines samples of Mona Lisa turquoise to identify their chemistry and structure, revealing copper as a major elemental component of the material.