Diamond Research Gives Clues to the Formation of the Continents
Karen V. Smit, April 25, 2019
Mineral inclusions trapped in diamonds reveal the continents’ construction – and help GIA researchers date diamonds.
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.
Ferropericlase Inclusion in Diamond
Evan M. Smith and Kyaw Soe Moe, January 27, 2017
An iridescent inclusion may reveal a diamond’s subsurface origin.
Coesite Inclusions with Filaments in Diamond
Evan M. Smith, Christopher Vendrell, and Paul Johnson, January 27, 2017
Inclusions with unusual formation are found in a treated Fancy Vivid yellow diamond.
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.
Grey-To-Blue-To-Violet Hydrogen-Rich Diamonds from the Argyle Mine, Australia
Carolyn H. van der Bogert, Christopher P. Smith, Thomas Hainschwang, and Shane F. McClure
The Argyle diamond mine is the only known source of type IaB hydrogen- and nitrogen-rich diamonds coloured grey to blue to violet.
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.
Pink Diamonds from Australia
Stephen C. Hofer, September 1, 1985
The author reports on a sudden influx of natural fancy pink diamonds and their origins.
Characterisation and Grading of Natural-Colour Pink Diamonds
John M. King, James E. Shigley, June 1, 2002
Known for their great beauty and rarity, pink diamonds have long been sought after by jewellers, collectors and consumers.
Three Notable Fancy-Colour Diamonds: Purplish Red, Purple-Pink and Reddish Purple
Robert E. Kane, June 1, 1987
The description and properties of three fancy-colour diamonds auctioned at Christie's.