Article Search Results

Article

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.

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.

Iridescent colors of the ferropericlase inclusion.

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.

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.

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.

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.

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.

Article Search Results

Types

Content Type

Reviewed

Topics

Topics

Gemstones

Gemstones

Article Search Results

Types

Content Type

Reviewed

Topics

Topics

Gemstones

Gemstones

Find a Retailer

Visit the campus shop

Subscribe to Knowledge Rocks Emails

G&G Spring 2021 Edition