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

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

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

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

An update on Virtu Gem’s mission to improve artisanal mining and gem trading practices in Kenya, Malawi, and Zambia.

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

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.

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

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

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

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