Quality assurance testing in the Bangkok lab reveals HPHT synthetic melee in larger sizes.

Optical activity is studied using a polished block of ametrine.

Chatoyancy, rarely seen in play-of-color opal, is observed in Ethiopian material.

Imitation pearls show kaleidoscopic colors with illumination.

A topaz hosting a group of inclusions is examined in the Carlsbad lab.

World-renowned jewelry artist Paula Crevoshay displays some of her newest pieces at the Tucson gem shows.

Insight into amethyst mining activity in Morocco.

A report on a new Ethiopian source of high-quality emerald.

Activity at Brazil’s Belmont mine is updated at Tucson.

An update on Nigerian colored stone production is obtained at the Tucson gem shows.

An eye-catching replica from a cult TV favorite is found in Tucson.

An overview of the trends reported at the 2017 Tucson gem shows.

Plastic Amber Imitation in a Rosary | Gems & Gemology

GIA examines a multi-elemental diffused and melt-grown synthetic sapphire for the first time.

Investigates the properties of synthetic zincite produced by industrial kilns in Poland.

A report from the second Jewelry Industry Summit, held in Tucson, Arizona on January 29–30, 2017.

Plans to develop a collective in a remote Brazilian rutilated quartz mining community are unveiled.

An experienced gem dealer gives an overview of sourcing gem-quality Afghan emeralds.

The recession of 2008 transforms a gem business into a vertically integrated operation.

A look at top-quality gems and insight into a delegation’s visit to gem mines in Myanmar.