A 6.79 ct orange pearl displays a fascinating spiral pattern.

Examination of a gigantic South Sea bead cultured pearl reveals an intriguing internal structure.

An exhibitor at the 22nd Street show offers an unusual type of obsidian from Armenia.

Investigation in the Carlsbad laboratory reveals a pearl submission is not mabe as initially believed.

A black opal cabochon set in a ring displays vivid orange play-of-color.

Bright green and nearly transparent jade from Guatemala, similar to jade from Myanmar, was available in Tucson.

A partially filled fissure in an emerald exhibits patterns resembling natural foliage.

A report on a submission of 26 yellow HPHT-grown diamonds from the Hong Kong laboratory.

A cluster of cloud inclusions in diamond forms a petal-like structure resembling a rose.

An omphacite inclusion surrounded by fractures in an orangy yellow diamond takes the shape of a hummingbird.

A report from the New York laboratory on colorless and near-colorless CVD gem diamonds produced by the Texas-based company Plasmability.

Vendors in Tucson exhibited Nigerian green beryl with concentrated color zones.

An HPHT-treated CVD-grown diamond displaying a blue growth band is examined in the Mumbai laboratory.

Examination of two chalcedony cabochons from a new source in Indonesia reveals an abundance of native copper.

A summary of the findings at the 2025 Tucson gem shows.

A large aquamarine crystal from Pakistan displays multiple eye-visible fluorite inclusions.

The Mumbai laboratory examines a modified pear portrait-cut natural diamond.

Investigates the correlations between peak positions in the 3309 cm–1 series with trace element concentrations for ruby, metamorphic and basalt-related blue sapphire, and laboratory-grown sapphire.

Archival research and gemological characterization reveal the geographic origin of two emeralds set in a pendant linked to Catherine de’ Medici, Queen of France from 1547 to 1559.