2023 Sinkankas Symposium
The Nineteenth Annual Sinkankas symposium, held at GIA’s Carlsbad, California campus, focused on gems and minerals of San Diego County.
Susan Jacques Receives Robert M. Shipley Award
GIA president and CEO Susan Jacques receives the American Gem Society’s highest honor.
A New Treatment: Creating Phantom Structure in Opal
A newly developed treatment creates a phantom structure in opal visually similar to natural phantom opal.
An Unusual Metallic Core in a Natural Pinctada radiata Pearl from Kuwait
Examination of natural pearls from Kuwait reveals one with a suspected metal oxide at the core.
Spring 2023 Auction Highlights
After a slow start, the spring 2023 auction season ends with multiple broken records.
Characteristics of Treated Rubies from Greenland
Special Hair-Like Inclusions in Quartz
A close look at inclusions in a variety of “rabbit hair” quartz samples.
Sustainability Conference at JCK
GIA participates in two sustainability panels during the 2023 JCK Las Vegas show.
Unique Colombian Emerald and Matrix Suite
A look at a unique matching set of emerald and brown matrix cabochons from the Muzo mine in Colombia.
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