The Carlsbad laboratory receives first submission of repaired grandidierite.

Tiny hematite crystal inclusions identified along two fractures in natural diamond.

A Queen conch shell bead is submitted for pearl identification to the Mumbai laboratory.

Examination of a natural freshwater pearl reveals a metallic core and suggests environmental contamination during the pearl’s formation.

The Carlsbad laboratory reports on a recently submitted necklace containing 63 pearls of various colors, shapes, sizes, and mollusk species, reportedly from Mexico.

An overview of one of the premier international jewelry trade shows in western Japan.

GIA’s Mumbai laboratory reports on a study of 988 reportedly “Venezuelan pearls.”

A look at an unusual saltwater bead cultured pearl consisting of two parts.

Anatase crystals create stunning blue interference colors in a Brazilian quartz host.

Feather inclusions observed in two natural diamonds evoke scenes in nature.

Examination of a rare orange sodalite reveals diopside and danburite inclusions, as well as short-lived tenebrescence.

Layered aragonite crystals create a translucent frosted surface appearance on a nacreous pearl from an Atrina mollusk.

An overview of the Fall 2025 Gems & Gemology content.

This second article in the series on Minas Gerais describes the major tourmaline deposits which produce some of the finest specimens ever seen.

A new synthetic ruby and synthetic blue sapphire have been synthesized by Johann Lechleitner of Innsbruck, Austria.

A new source of red tourmaline is identified in Zambia.

Chinese peridot is similar to peridots from other localities.

Chinese gem-quality turquoise is sky blue, greenish blue, or bluish green in color.

Blue sapphires from China are similar to gem corundum from Australia, Thailand, and Kampuchea (Camodia).