Article Search Results

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.

A row of various shaped cut and polished pink diamonds.

Article

Why are Pink Diamonds Pink? GIA Researchers Dive Deep into their Crystal Structure

Russell Shor, October 18, 2019

GIA researchers analysed more than 90,000 natural pink diamonds to better understand how these rare and beautiful diamonds formed and got their colour.

On the left is a 5.26 ct Fancy deep blue heart shape HPHT synthetic diamond. On the right is a 5.27 ct Fancy deep blue emerald cut HPHT synthetic diamonds.

Article

The Latest on Synthetic Diamonds

GIA, September 8, 2017

Dr James Shigley, GIA distinguished research fellow, is one of the foremost experts in diamonds and their identification. In this presentation recorded at the 2017 JCK Las Vegas show, he shares the latest developments about HPHT and CVD synthetic diamond

Article

Autumn 2016 G&G: CVD Synthetic Diamonds Survey, Reversible Colour Change in Blue Zircon

Jennifer-Lynn Archuleta, October 31, 2016

A summary of the content found in the Autumn 2016 issue of Gems & Gemology.

Article

Summer 2016 G&G: Diamonds from Diavik, Responsible Sourcing and Fabergé Cossack Figures

Jennifer-Lynn Archuleta, August 3, 2016

A summary of the content found in the Summer 2016 issue of Gems & Gemology.

Article

Photoluminescence Review and Gem Material from Unusual Locales in the Spring 2016 G&G

Jennifer-Lynn Archuleta, April 26, 2016

A summary of the content in the Spring 2016 issue of Gems & Gemology.

Yellow HPHT-Processed Rough Diamond

Sally Chan, November 23, 2015

HPHT annealing of a nearly eye-clean yellow natural rough diamond is revealed through spectroscopic analysis.

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

Article

Autumn 2015 G&G: Trapiche Emeralds, Synthetic Diamonds and a Large Diamond Source

Russell Shor, November 4, 2015

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

Article

Summer 2015 G&G: Dual-Stars, Photomicrography Guide, Rubies from Tajikistan, New Micro-World Section

Russell Shor, August 14, 2015

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

LPHT-annealed CVD synthetics with their DiamondView images

LPHT-Annealed Pink CVD Synthetic Diamonds

Kyaw Soe Moe, Ulrika D’Haenens-Johansson, and Wuyi Wang, July 31, 2015

The New York lab examines three pink CVD synthetic diamonds which have received LPHT annealing treatment.

Article Search Results

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Gemstones

Article Search Results

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Gemstones

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