This section, from the Winter 2012 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

Irradiated South Sea cultured pearls (SSCPs) from the Pinctada maxima mollusk typically show colors from light gray to silver.

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.

This section, from the Winter 1990 issue of Gems & Gemology, is a compilation of interesting finds from GIA's laboratories.

“Gem Testing, 10th Edition”; “Engagement and Wedding Rings: The Definitive Buying Guide for People in Love”; “Islamic Rings and Gems: The Zucker Collection”

This section, from the Winter 1989 issue of Gems & Gemology, is a compilation of interesting finds from GIA's laboratories.

This section, from the Winter 1997 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

Hemispherical aggregates of the mineral barite were identified as inclusions in fluorite from Illinois.

One of the greatest concerns with emerald filling is the degree of clarity enhancement such treatment represents

Straight, acicular, colorless solid inclusions in demantoid garnet from the Ural Mountains of Russia were investigated by laser Raman microspectrometry.

This section, from the Winter 1999 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.