A natural saltwater pearl displays the optical illusion of a bumpy texture.

An unusual effect created by the backing on a jade carving is observed in the Carlsbad laboratory.

Arcade-style games in Japan dispense akoya pearl jewelry as prizes.

Hexagonal etch features are observed on the prismatic faces of heliodor and aquamarine crystals.

A rare chatoyant hexagonite is examined in GIA’s New York laboratory.

A natural faceted diamond displays a prominent square-shaped cloud under the table.

Two natural diamonds containing cloud inclusions that resemble stars are examined in the Carlsbad laboratory.

GIA’s Bangkok laboratory studies emeralds from the Curlew mine’s recently renewed production.

Provides a visual guide to the internal features of tourmaline as well as tourmaline inclusions in other gem hosts.

Reviews the advancements and major trends in laboratory-grown diamonds observed by GIA since 2007.

Examines gem-quality cassiterite from southwest China and analyzes trace element chemistry to distinguish it from Bolivian cassiterite.

Characterizes an anorthoclase variety of alkali feldspar found in southeast Vietnam and evaluates its potential for commercial use.

Artist Valentina Fetisova transforms labradorite cabochons into remarkable works of art.

An overview of the Summer 2024 Gems & Gemology content.

Dr. Rodney Ewing, a member of the GIA Board of Governors from 2006 to 2015, passed away earlier this month at age 77.

Dr. Rodney Ewing, a member of the GIA Board of Governors from 2006 to 2015, passed away earlier this month at age 77.

Members of the first class to complete the GIA Graduate Gemologist® program in New York City gathered.

Learn the latest on Madagascar sapphires and demantoid garnets from Wim Vertriest, GIA Manager of Field Gemology.

Experience the world of gemology in person with GIA at Couture and JCK Las Vegas.