A perfectly shaped euhedral tourmaline crystal is identified in a faceted tourmaline.

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

An aquamarine crystal from Pakistan contains a pseudomorphic quartz inclusion.

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

A report on the increase of artificially assembled or altered specimens circulating in Pakistan’s local gem markets.

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

Multiple vivid blue lazurite inclusions are observed in a near-colorless scapolite.

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

A pink spinel hosts a richly textured, opaque metallic inclusion.

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

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.

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.