The production of Chinese freshwater pearls faced little disruption from the global pandemic according to sources at the World Pearl Congress.

Unusual color zoning likely indicates multiple treatments of a Fancy Intense green-yellow diamond.

This article reports on a detailed gemological examination of this new synthetic cat's-eye alexandrite.

Researchers of the Tairus joint venture have developed the technology for the hydrothermal growth of gem-quality crystals of synthetic sapphire.

A cluster of bladed columbite crystals is identified in colorless topaz.

A GIA student from the London campus receives recognition for a necklace design featuring baroque pearls, diamonds, and light pink garnets.

Strong linear brown zoning is observed in a Fancy Dark yellow-brown diamond.

An iridescent partially healed fissure is observed in a blue sapphire from Sri Lanka.

The author has uncovered many ancient references to the simulation or enhancement of gemstones.

A useful way to identify stones that contain no distinguishing inclusions.

Over the last decade, Pakistan has developed into an important source for many gem materials. A number of localities have been identified for emeralds in particular.

With the withdrawal of Soviet troops from Afghanistan, villagers in the Panjshir Valley are turning their attention to the emerald riches of the nearby Hindu Kush Mountains.

The Anahí mine in southeastern Bolivia has enjoyed consistent production since 1990 and is best known for its ametrine.

Gem Testing lab in Jaipur, India recently examined a white-brown, translucent to opaque oval cabochon that turned out to be a composite featuring an unusual combination of gem materials.

Alexander Arnoldi explains the strategy of Arnoldi International and provides an update on some new high-quality materials.

Suggested Reading on Diamond Inclusions

A look at JTV’s history, current activities, and impact on the industry.

New developments relating to the Winter 2016 article on synthetic emeralds grown by Prof. Richard Nacken.

Dave Bindra shows some noteworthy pieces he obtained on the secondary market and shares his thoughts on the state of the colored stones market.