A mabe pearl exhibits an unusual pattern of intersecting subsurface channels, likely formed by shell-boring parasites.

Microscopic examination of a non-nacreous natural pearl reveals a distinctive pattern resembling leaves with intricate vein structures.

Several natural pearls in a multistrand necklace display an unusual reticulated surface texture with deep indentations and prominent ridges.

Microscopic examination of a Pakistani peridot reveals a rare cylindrical fluid inclusion with a freely moving gas bubble.

Thin-film decrepitation inclusions create a colorful scene in a beryllium-diffused orange sapphire.

Numerous Rose channels against a backdrop of scattered zircon crystals produce a striking night-sky effect in a color-change sapphire.

The first known occurrence of a vesuvianite inclusion in sapphire is documented.

A cluster of transparent inclusions in spinel displays various fluorescent colors under short-wave ultraviolet light.

A partially etched colorless diamond octahedron hosts numerous opaque black chromite crystals.

An overview of the Summer 2026 Gems & Gemology content.

GIA 和 Gübelin 宝石实验室研究人员确认 paraíba 电气石的新来源

Join us at the Bangkok Gems & Jewelry Fair to explore a diverse range of gemstones, jewelry and industry solutions from leading Thai and international suppliers. Discover tools, components and machinery for the trade, and attend GIA seminars on pearls and diamond fluorescence.

CARLSBAD, Calif. – September 8, 2026 – Gordon E. Brown, Jr., a member of the GIA Board of Governors from 1988 to 2008 passed away in August.

CARLSBAD, Calif. – September 8, 2026 – Gordon E. Brown, Jr., a member of the GIA Board of Governors from 1988 to 2008 passed away in August.

GIA 和 Gübelin 宝石实验室研究人员确认 paraíba 电气石的新来源

研究人员确认了paraíba电气石的新来源

Examination of a green-blue apatite reveals goethite in a surface-reaching fracture.

A summary of the findings at the 2026 Tucson gem shows.

Iridescent thin films in aquamarine resemble fireworks in the night sky.

A diamond’s cloud and crystal inclusions create a unique scene.