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

Imitation pearls show kaleidoscopic colors with illumination.

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

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

A sapphire with a color not commonly seen in the lab is found to have a glass filling.

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

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

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

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

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

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

Describes the occurrence of iridescence, and the role of differential etching, in quartz crystals from India’s Jalgaon District.

A new mining operation in Montepuez is profiled.

Recounts the history, geology, and notable localities of diamond mining in Brazil, and outlines plans for future diamond production.

An exclusive interview with Ian Harebottle, CEO of Gemfields.

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

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

An overview of the Spring 2017 Gems & Gemology content.

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

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