Join GIA at AGTA GemFair Tucson, January 31–February 4, 2027

Examination of two corundum samples reveals intriguing inclusion scenes reminiscent of Chinese mythology.

An inclusion observed in a diamond resembles “horsetail” inclusions found in demantoid garnet.

A hornblende pseudomorph inclusion creates a striking scene in a Mexican opal.

Long-wave UV light reveals a vivid natural landscape scene in an opal from Hokkaido, Japan.

A distinct spiral pattern is observed on the surface of a Tridacninae pearl.

A transparent colorless quartz hosts a series of well-formed green tsavorite crystals.

Eye-catching inclusions are captured in a batch of oil-bearing quartz crystals.

Orange parisite and black riebeckite inclusions are observed in a smoky quartz specimen from Pakistan.

A crescent-shaped columbite inclusion is revealed in a sapphire from France.

A transparent topaz from Pakistan hosts multiple columbite-supergroup mineral crystals.

A rare occurrence of crystalline turquoise is documented on a quartz specimen from the Bishop mine in Virginia.

An overview of the Fall 2026 Gems & Gemology content.

CARLSBAD, Calif. – TBD – GIA has acquired an unsurpassed collection of 2,665 crystals, gems, and minerals, each exhibiting extraordinary inclusions composed of foreign minerals, as well as trapped fluids and structural characteristics. The unique collection was curated over 60 years by GIA Analytical Microscopist John Koivula, who is widely regarded as the world’s foremost expert in identifying and documenting gem inclusions

CARLSBAD, Calif. – TBD – GIA has acquired an unsurpassed collection of 2,665 crystals, gems, and minerals, each exhibiting extraordinary inclusions composed of foreign minerals, as well as trapped fluids and structural characteristics. The unique collection was curated over 60 years by GIA Analytical Microscopist John Koivula, who is widely regarded as the world’s foremost expert in identifying and documenting gem inclusions

Presents detailed identification characteristics of blue sapphire from the Baw Mar deposit in the Mogok Stone Tract and estimates the timing of the sapphire’s formation.

Travel with GIA’s field gemology team to northern Vietnam as they explore local mining and trading communities, revealing the connection between gemstones and their origins.

Review of The Historic Teachings of Gemcutting: 50 Antique Gemstone Designs, by Justin K. Prim.

Traces the evolution of China’s freshwater pearl culturing industry since 1949, exploring how environmental regulation and sustainable development can result in a shift from volume-driven production to higher-quality, environmentally responsible outputs.

Join GIA expert Dr. Aaron Palke as we unveil groundbreaking research confirming Ethiopia as a significant new source of copper-bearing paraíba tourmaline. Learn how these findings impact origin determination, identification methods, and the broader colored gemstone market as this new production enters the market.