Colorful rays of light are observed in an Australian rainbow lattice sunstone.

A CVD-grown diamond exhibits an interesting clarity characteristic.

Several vendors offered a variety of impressive non-nacreous pearls at the Tucson gem shows.

An overview of the Spring 2024 Gems & Gemology content.

Learn about Texas topaz history and geographic origin research.

Discover a bicolor chameleon diamond, a diamond with carbon dioxide, and a pink square inside a diamond.

Learn all about the gems of Northern Madagascar in this exciting video with Wim Vertriest, GIA Manager of Field Gemology.

This reading list gives you an opportunity to learn more about the history of blue sapphires from Kashmir.

Provides a visual guide to the internal features of different varieties of beryl.

Explores the formation of sedimentary rocks, gems found and formed in sedimentary environments, and the alluvial mining of these gems.

Documents the gemological properties, chemical composition, and appearance of petrified tree fern discovered in northeast China.

Examines a technique for setting cut garnets on glass objects, invented by Claudius vom Creutz of Nuremberg in the late sixteenth century.

Reports on the recent production of precious and common opal from a centuries-old locality.

A comprehensive look at Texas topaz, detailing its gemological and compositional characteristics and providing a basis for using trace element concentrations to identify its origin.

A spectacular display of hollandite crystals is captured within an amethyst cabochon.

A Fancy Deep brownish orange treated HPHT-grown diamond exhibits multiple defect concentrations in various growth sectors.

A feather observed in a natural diamond resembles a large reptile.

A rare occurrence of 14 trapiche patterns is observed in a garnet sample from Vietnam.