Microscopic examination of a ruby at the Carlsbad laboratory reveals synthetic overgrowth indicative of high-temperature heat treatment.

Examines the mining history and geological characteristics of the three secondary sapphire deposits in the state of Montana, as well as the properties of these sapphires (unheated and heat-treated).

Award-winning jewelry designer Brenda Smith shares some of her creations at the AGTA GemFair in Tucson.

One of the finest specimens of double pseudomorph ikaite-calcite-opal ever unearthed was on display at the Pueblo Gem & Mineral Show.

An impressive variety of natural, wild, nacreous, and non-nacreous pearls were on display at the GJX show.

One-of-a-kind bejeweled pens from Zeki Karaca caught the attention of attendees at the GJX show.

A 586.43 ct cat’s-eye aquamarine is donated to the Smithsonian National Museum of Natural History.

Stefan and Alexander Kreis share three impressive gemstone acquisitions at GJX in Tucson.

Examination of a purple spinel from Tanzania reveals a rare forsterite inclusion.

Unique rough and faceted luminescent synthetic garnet-like crystals were on display at the 22nd Street show in Tucson.

Bill and Carl Larson share details about new tourmaline pocket discoveries at the Tourmaline King mine.

Examination of quartz from a new source in Madagascar reveals complex fluid inclusions consisting of petroleum, methane, asphaltite, and water.

A look at plastic deformation, one of the most prevalent features in natural diamond.

An overview of the Spring 2023 Gems & Gemology content.

A graduate of GIA’s Jewelry Design program in London is the recipient of the 2022 Gianmaria Buccellati Foundation Award.

Evaluates the growth mechanisms of special morphological features in Colombian emerald, including possible relationships to trapiche emeralds and samples displaying the gota de aceite effect.

A look at the largest CVD diamond GIA has encountered to date.

GIA is adding a report comment employing the trade color term “Peacock” for designated colors of cultured pearls from the Pinctada margaritifera black-lipped pearl oyster, commonly known as Tahitian pearls.

GIA is adding a report comment employing the trade color term “Peacock” for designated colors of cultured pearls from the Pinctada margaritifera black-lipped pearl oyster, commonly known as Tahitian pearls.