Two Foraminifera-Like Objects Found in a Natural Saltwater Pearl
A Unique Petrified Tree Fern from Northeast China
Documents the gemological properties, chemical composition, and appearance of petrified tree fern discovered in northeast China.
Slovak Opal: A New Life for a Historical Gem
Reports on the recent production of precious and common opal from a centuries-old locality.
Gems Recovered from Sedimentary Rocks
Explores the formation of sedimentary rocks, gems found and formed in sedimentary environments, and the alluvial mining of these gems.
Trapiche Garnet from Vietnam
A rare occurrence of 14 trapiche patterns is observed in a garnet sample from Vietnam.
A Unique Omphacite Jade Pendant
In Memoriam: Heitor Barbosa
Texas Topaz, Slovak Opal, a Beryl Inclusions Chart, and More
Carbon Dioxide in a Brown Diamond
More on Virtu Gem’s Ethical Supply Chain Practices
An update on Virtu Gem’s mission to improve artisanal mining and gem trading practices in Kenya, Malawi, and Zambia.
Topaz from Mason County, Texas
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.
Bohemian Garnets as Decorative Materials for Glass Vessels from the Late Sixteenth to Early Eighteenth Centuries
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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