75th Swiss Gemmological Society Conference and European Gemmological Symposium
A report from the 75th Swiss Gemmological Society Conference and European Gemmological Symposium, held in Zermatt, Switzerland June 30–July 1, 2017.
Unusual Inclusions in Green Synthetic Sapphire
A green step-cut synthetic specimen hosts inclusions that provide insight into its growth method.
Impregnated Amazonite
High-quality amazonite currently available in the jewelry market is tested at GIA’s Carlsbad laboratory.
La Lechuga Monstrance
A devotional object in the baroque style is on a brief European tour through the new year.
Emerald with Mobile Inclusion
An emerald rough displays a large, multiphase inclusion suspended in fluid.
Elements in Synthetic Overgrowth on Flux-Heated Ruby and Beryllium-Diffused Sapphire
Synthetic overgrowth caused by two different types of treatment are found on two samples in the Tokyo lab.
Natural Freshwater “Fish” Pearl
A uniquely shaped freshwater pearl is examined in the New York lab.
Screening of Mounted Melee Using the GIA iD100
GIA’s new screening device accurately identifies an HPHT-grown melee diamond.
Unusual Bodycolors ofPrecious Opal
Two stones with unusual bodycolor are identified as precious opal.
Letters: Note on CVD Synthetic Overgrowth
A response to the Summer 2017 Lab Note on CVD synthetic overgrowth on a natural diamond.
Unusual Cloud in Diamond
A diamond with a previously unseen clarity characteristic is seen in GIA’s Carlsbad lab.
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