Sapphire Beneath the Rich Black Soil of Muling, Northeastern China
A comprehensive look at the gemological features and advanced analysis of blue and fancy-color sapphire from the agricultural area of Muling, China.
Gemological Characteristics of Low-Temperature “Gel-Filled” Turquoise
A report on the examination of “gel-filled” turquoise produced in Zhushan County in Hubai Province, China.
Fall 2022 G&G Available Now
Book Review: Pegmatites and Their Gem Minerals
Review of Pegmatites and Their Gem Minerals, by Michael Menzies and Jeffrey Scovil.
Book Review: Pegmatites and Their Gem Minerals
The Geographic Origin of Diamonds, Sapphire from China, and Pigments Sourced from Gem Materials
An overview of the Fall 2022 Gems & Gemology content.
Large Diamond Inclusion in Diamond
A fascinating diamond crystal inclusion displaying a transparent, ghost-like appearance is identified in a Faint green diamond.
Smithsonian’s Great American Diamonds Exhibit
Two impressive diamonds from Arkansas and Colorado are featured in the Great American Diamonds exhibit at the Smithsonian’s National Museum of Natural History.
The Big Find: Celebrating 50 Years of Maine Tourmaline
The historic discovery of a Maine tourmaline source is celebrated through jewelry designs featuring gems unearthed 50 years ago.
Inclusions in Gemstones
This installment of “Colored Stones Unearthed” explores inclusions in gems—how they form, how they are studied, and what they mean for gemologists and geoscientists.
Natural Radioactivity in Select Serpentinite-Related Nephrite Samples: A Comparison with Dolomite-Related Nephrite
Uses gamma-ray spectrometry to directly measure internal radioactivity in green nephrite from deposits in Poland, Russia, Canada, and New Zealand.
Brilliance Exhibit at the Natural History Museum of Los Angeles County
A glimpse at the rare gems recently on display at the Natural History Museum of Los Angeles County’s Brilliance: The Art and Science of Rare Jewels exhibit.
Characteristics of Newly Discovered Amber from Phu Quoc, Vietnam
Offers the first detailed summary of amber from the Vietnamese island of Phu Quoc and a comparison with Baltic, Dominican, and Burmese material.
Unusual Cat’s-Eye Omphacite Fei Cui Jade
A unique jade cabochon with vivid green bodycolor and pronounced chatoyancy is examined at a lab in Shanghai.
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