Derek Katzenbach: Faceter, Gem Artist, Custom Jeweler
Maine-based designer Derek Katzenbach discusses his education and inspiration.
Gem Legacy: A Nonprofit for East African Communities
A gem dealer gives back to the mining communities that have supplied gems over the course of his career.
Gray Spinel: A New Trend in Colored Stones
In recent years, the colored stone world has seen a growing appetite for unusual colors.
Jeff Hapeman: Stories from a Gem Cutter
Jeff Hapeman of Earth’s Treasury (Westtown, Pennsylvania) loves a gemstone with a good story.
CVD Layer Grown on Natural Diamond
A composite of synthetically grown and natural diamond was recently identified by the Carlsbad laboratory.
Conversation with Color Source Gems
Moshe and Rachel Chalchinsky of Color Source Gems talk about current trends in the gem and jewelry trade.
Book Review: Narrative Jewelry: Tales from the Toolbox
Review of Narrative Jewelry: Tales from the Toolbox by Mark Fenn.
Condor Agate from Argentina
A vibrant orange and yellow agate displays interesting concretions in its core.
“Double Bubble” Multiphase Inclusion in Beryl
Grandidierite Inclusions in Sapphires
Grandidierite, an unusual inclusion in sapphire, independently encountered by two laboratories.
Quarterly Crystal: Orpiment in Barite
Sapphire Inclusion with Rutile “Silk” in a Burmese Star Sapphire
Illumination techniques reveal a remarkable sapphire inclusion within a Burmese star sapphire.
Star-Like Growth in Natural Yellow Sapphire
A natural yellow sapphire features a distinctive star-like graining pattern.
Jewelry Glossary Project Survey
Moonstone Jewelry
The adularescent gem moonstone was prominently featured in this year’s Tucson shows.
Sapphires from Colombia
Unheated material from a sapphire deposit in southern Colombia is examined in GIA’s Carlsbad lab.
Faint Green HPHT Synthetic Diamonds
Faint green HPHT synthetic diamonds recently submitted to the Carlsbad lab owe their color to high concentrations of nickel.
Freshwater Bead-Cultured Pearls with Multiple Features of Interest
GIA’s Hong Kong laboratory examines a freshwater bead-cultured pearl necklace possessing several interesting features.
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