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Article

G&G Announces Most Valuable Article Awards

The G&G Staff, May 12, 2020

G&G announces the winners of the Dr Edward J. Gübelin Most Valuable Article Awards for 2019.

A face-up view of a cushion cut diamond with blue color.

Article

Gems & Gemology’s 7 Most Unusual Encounters from 2019

Stuart Overlin, Brooke Goedert and Kellie Giordano, December 13, 2019

Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.

Looking down the crystal axis of a back-lit 58.83 ct trapiche emerald

Article

Emerald: The Superstar of Trapiche Gemstones

Sharon Bohannon, May 17, 2019

Trapiche emeralds, which display a distinct six-spoke wheel pattern, set the standard as some of the finest and most spectacular crystals ever unearthed.

Real-Time Microradiography of Pearls: A Comparison Between Detectors

January 26, 2018

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).

Preliminary Observations on Facet-Grade Ruby from Longido, Tanzania

Boodsakorn Kongsomart, Wim Vertriest, and Vararut Weeramonkhonlert, January 26, 2018

Microscopic observation and trace element analysis is performed on rubies from Longido.

Suggested Reading on Rubies and Their Inclusions

January 19, 2018

Suggested Reading on Rubies and Their Inclusions

A round, bright red gem displayed on a dark gray background.

Article

The Red Hot Gems of Summer

Sharon Bohannon, August 21, 2017

These red, pink and orange hued gems evoke passion and excitement – and are sure-fire accessories for sultry summer days.

Article

Visit Two of Mogok’s Most Important Mines with GIA

GIA Staff, October 6, 2016

Join GIA’s field gemmologists as they visit two of Mogok’s most important mines: the Dattaw ruby mine and Baw Mar sapphire mine.

Ruby and Sapphire from Muling, China

Yimiao Liu and Ren Lu, April 28, 2016

An emerging corundum deposit in north-eastern China is discussed.

Article

Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G

Russell Shor, February 1, 2016

G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.

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