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.
Wollastonite Blizzard Within Glass
Beads believed to be synthetic quartz are discovered to be glass with a surprising set of inclusions.
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.
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
The Beauty of Natural Green Diamonds
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.
Katzenbach Designs 在两年内荣获两项 AGTA 奖
Designer specializes in Maine tourmaline, precision faceting, fantasy-cut gemstones and custom-designed jewelry.
Suggested Reading on Rubies and Their Inclusions
Suggested Reading on Rubies and Their Inclusions
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