In Memoriam: Andrew Cody
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
Large Diamond Inclusion in Diamond
A fascinating diamond crystal inclusion displaying a transparent, ghost-like appearance is identified in a Faint green diamond.
“Boomerang” Inclusion in a Rough Topaz
A Zircon with Strong Photochromic Effect
Yellow Sapphires with Unstable Color
A lab in Bangkok shares study on color stability in yellow sapphire.
Topaz Crystals in Red Beryl
Diamonds from Guyana, Ekanite from Sri Lanka, a New Amber Source in Vietnam, and More...
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.
The Shape of Ekanite
Discusses the unusual surface characteristics of ekanite from secondary deposits in Sri Lanka.
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.
The Type IIb De Beers Cullinan Blue Diamond
GIA’s New York laboratory reports on a 15.10 ct Fancy Vivid blue cut-cornered rectangular step cut named the De Beers Cullinan Blue diamond.
.jpg "YMAL GIA Ed")
