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Garnet
Garnets are a set of closely related minerals forming a group, with gemstones in almost every color.
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Gems of Northern Madagascar Video with GIA Field Gemology
Learn all about the gems of Northern Madagascar in this exciting video with Wim Vertriest, GIA Manager of Field Gemology.
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.
Trapiche Garnet from Vietnam
A rare occurrence of 14 trapiche patterns is observed in a garnet sample from Vietnam.
Guest in Garnet: Metal Sulfide?
An intriguing metallic inclusion is observed in a faceted garnet.
Pink Pyrope Garnet
A rare example of pink pyrope garnet is examined in the Carlsbad laboratory.
Unusual “Horsetail” and Columnar Inclusions in Demantoid
Examination of a yellowish green demantoid reveals fibers of serpentine in a randomly curved pattern and a columnar two-phase negative crystal.
Book Review: Pegmatites and Their Gem Minerals
Review of Pegmatites and Their Gem Minerals, by Michael Menzies and Jeffrey Scovil.
Baroque-Era Rose Cuts of Colored Stones: Highlights from the Second Half of the Seventeenth Century
Offers a systematic evaluation of rose cuts produced for various colored stones in the latter seventeenth century, based on the examination of rare artifacts that belonged to the archbishops and prince-electors of Trier and Cologne.
Jeweler Creates ‘Medal of Honor’ Pin to Recognize Coronavirus Health Care Fighters
GIA graduate Franco Valobra creates a commemorative pin to recognize health care workers on the frontline of the coronavirus battle for survival.
Discovery of Color-Change Chrome Grossular Garnets from Ethiopia
The first known group of color-change gem-quality chrome grossular garnet, reportedly from Ethiopia, is examined in GIA’s Carlsbad lab.
Gemstone Guidebook Project
A project coordinated by GIA and the NGO Pact provides a valuable educational tool to women miners in Tanzania.
Update on Russian Demantoid Production
Alexey Burlakov shares insights on the current production of Russian demantoid and emeralds.
