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.

An overview of the Spring 2017 Gems & Gemology content.

An exclusive interview with Ian Harebottle, CEO of Gemfields.

A report from Tucson on the outlook of the pearl market.

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.

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.

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

Paintings created from uncut gem fragments are seen at Tucson’s GJX show.

Exceptional gems that are recirculated in the gem market make an impact at the Tucson shows.

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.

Identifies 13 copper-bearing tourmalines, which have traditionally been assumed to be elbaite species, as liddicoatite.

A family sources, designs, and carves gems for extraordinary jewelry and pieces.