Filled Pearl with Surface Features
A pearl, thought to be natural, is revealed to be a bead-cultured specimen with a pre-drilled nucleus.
Coated Beryl Imitating Emerald
Coating on a beryl demonstrates the importance of thorough examination of jewelry and gem materials.
Synthetic Moissanite Imitating Rough Diamond
A light green specimen, submitted as a rough diamond, is actually a synthetic moissanite.
Cat’s-Eye Alexandrite with Unique Inclusion Pattern
Examination of a chatoyant alexandrite cabochon.
New Phenomenal Feldspar from North Carolina with Iridescent Inclusions
A deposit in North Carolina yields potassium feldspar with a phenomenon similar to Australian rainbow lattice sunstone.
Wollastonite Blizzard Within Glass
Beads believed to be synthetic quartz are discovered to be glass with a surprising set of inclusions.
Accurate Reporting of Key Trace Elements in Ruby and Sapphire Using Matrix-Matched Standards
Presents a group of corundum standards developed by GIA to improve the accuracy and efficiency of its laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) instruments.
Two Unusual Natural Sapphires with Synthetic Ruby Overgrowth
For the first time, the Carlsbad and New York labs see natural sapphire seeds with synthetic ruby overgrowth.
Real-Time Microradiography of Pearls: A Comparison Between Detectors
Compares the image quality provided by real-time microradiographic imaging (RTX) units fitted with two different detectors: an image intensifier (II) and a flat panel detector (FPD).
宝石大师：Dreher（德雷尔）家族及其非凡的雕刻造诣 (英语)
A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.
The World’s Biggest Diamonds: Windows into the Earth’s Deep Mantle
An overview of the Winter 2017 Gems & Gemology content.
Data Supplement
Compares the image quality provided by real-time microradiographic imaging (RTX) units fitted with two different detectors: an image intensifier (II) and a flat panel detector (FPD).
Chart: Inclusions in Natural, Synthetic, and Treated Ruby
Provides a visual guide to the internal features of natural, synthetic, and treated rubies.
Preliminary Observations on Facet-Grade Ruby from Longido, Tanzania
Microscopic observation and trace element analysis is performed on rubies from Longido.
New Plastic Imitation Opal from Kyocera
A plastic product that mimics the play-of-color phenomenon of natural opal but has distinctly different gemological properties is now available to consumers.
GSA 2017 Annual Meeting
Experts shared the latest research on gemstones at the Geological Society of America annual meeting in Seattle.
Gota de Aceite in a Zambian Emerald
A phenomenon usually seen in Colombian emeralds is found in a specimen from Zambia.
Designer’s ‘Complex, Eccentric’ Pieces Create Buzz, Find Fans in Hollywood and D.C.
Los Angeles designer designs a popular political pendant, is earning national press coverage and finding fans among Hollywood A-listers.
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