Search Results

Unstable Radiation-Induced Yellow-Green Color in Grossular Garnet

Kurt Nassau, George R. Rossman, September 1, 1992

Exposure of some colorless to pale-hued African grossulars to either 60Co or 137Cs gamma rays turns them light yellow-green.

Abstracts; Winter 1991

Dona M. Dirlam

This article, from the Winter 1991 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

Abstracts; Fall 1991

Dona M. Dirlam

This article, from the Fall 1991 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Winter 2009

Brendan M. Laurs, Thomas W. Overton

This article, from the Winter 2009 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

Abstracts; Summer 2009

Brendan M. Laurs, Thomas W. Overton

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

Small unheated spinel and sapphire exhibited by Madagascar Imports

Unheated and Unusual Colors

Jennifer Stone-Sundberg, May 11, 2018

Margit Thorndal of Madagascar Imports offers her perspective on the colored stone market.

Orange-red-purple garnet and green clinopyroxene minerals can be analyzed for specific isotopes to help determine diamond ages.

Diamonds from the Deep: How Old Are Diamonds? Are They Forever?

Karen V. Smit and Steven B. Shirey, May 15, 2019

Age dating diamonds, which have been forming for billions of years, using isotope analyses reveals new information about the deep earth.

Gems & Gemology Turns 90!

Duncan Pay, May 3, 2024

An overview of the Spring 2024 Gems & Gemology content.

Article

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

Jennifer-Lynn Archuleta, April 28, 2016

A summary of the content in the Spring 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.

Types

Topics

Topics

Gemstones

Gemstones

Search Results

Types

Topics

Topics

Gemstones

Gemstones

You Might Also Like

Learn About Education On Campus and Online

GIA NextGem™Diamond Trainingfor Retail

Explore GIA Laboratory Promotional Offers

Shop theGIA Store

GIA NextGem™
Diamond Training
for Retail

Shop the
GIA Store