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

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

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

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

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

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

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

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

GIA’s Al Gilbertson receives the American Gem Society’s highest honor.

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 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.