Article Search Results

A large group of people outside on GIA’s Carlsbad, California campus.

Article

Guardians of Trust: GIA’s Innovative Research, Instruments and Services

Russell Shor, September 20, 2019

GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.

A woman sits in front of a computer screen with the DiamondView to her right.

Article

Inside De Beers’ Lightbox Diamonds

Russell Shor, March 18, 2019

GIA researcher analyses and confirms that De Beers’ Lightbox diamonds are grown using the chemical vapour deposition process.

Fluorescence produced by optical defects in diamond: measurement, characterisation and challenges

Yun Luo, July 24, 2013

How variations in UV lamp output can affect observed fluorescence colour and intensity.

Evan Smith studies images of diamond inclusions on a computer.

Article

Postdoctoral Programme Gives Scientists Access to Rare Research Opportunities

Amanda J. Luke, November 16, 2016

GIA’s postdoctoral programme gives researchers access to gemmological data, equipment, and rare, unusual and large gems in its laboratories.

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.

Coloured Diamonds in the Aurora Butterfly of Peace Collection

The “Type” Classification System of Diamonds and Its Importance in Gemmology

Christopher M. Breeding and James E. Shigley, June 1, 2009

Knowledge of type allows gemmologists to better evaluate if a diamond might be treated or synthetic, and whether it should be sent to a laboratory for testing.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Summer 2009

Brendan M. Laurs, Thomas W. Overton

This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

Star of the South: A Historic 128 Ct Diamond

Christopher P. Smith and George Bosshart, March 1, 2002

This article presents the first complete gemmological characterisation of the historic 128.48 ct Brazilian diamond known as the Star of the South.

10 Study Samples Before and After HPHT Processing

GE POL Diamonds: Before and After

Christopher P. Smith, George Bosshart, September 1, 2000

This article explores and identifies the changes that type IIa GE POL diamonds experience before and after HPHT annealing.

A Visual Guide to the Identification of Filled Diamonds

Shane F. McClure and Robert C. Kammerling, June 1, 1995

This article illustrates the various features in filled diamonds and explores the best techniques for examining them.

Article Search Results

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Gemstones

Article Search Results

Types

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Gemstones

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