Article Search Results

Show Filters
Showing 13 results for "*"
Fluorescence Produced by Optical Defects in Diamond: Measurement, Characterization, and Challenges

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

Read More

Hydrogen-rich Diamonds
Gray-To-Blue-To-Violet Hydrogen-Rich Diamonds from the Argyle Mine, Australia

The Argyle diamond mine is the only known source of type IaB hydrogen- and nitrogen-rich diamonds colored gray to blue to violet.

Read More

Digital Photomicrography for Gemologists

A guide to capturing gem inclusion scenes using practical equipment and techniques and the appropriate image-refining software.

Read More

Computer Rendering of the “French Blue” Diamond
The French Blue and the Hope: New Data from the Discovery of a Historical Lead Cast

With the use of modern tools and technology, this article sheds light on the history and provenance of both the French Blue and the Hope diamonds.

Read More

Color Grading of Colored Diamonds in the GIA Gem Trade Laboratory

How GIA’s Gem Trade Laboratory grades colored diamonds, including an expanded color grading terminology, is explained.

Read More

De Beers near Colorless-to-Blue Experimental Gem-Quality Synthetic Diamonds

De Beers has produced a faceted synthetic gem-quality diamond that could go unrecognized without careful gemological testing.

Read More

Treated-Color Pink-To-Red Diamonds from Lucent Diamonds Inc.

Using a multi-step process, Lucent Diamonds has developed a new treatment process for certain natural diamonds that creates colors from pink-purple through red to orangy brown.

Read More

GemCad View of the French Blue Enclosed Within the Tavernier Blue
A Crystallographic Analysis of the Tavernier Blue Diamond

This study uses both historical information and modern data to create a computer model of the Tavernier Blue, orienting the finished diamond within the original diamond crystal.

Read More

Colored Diamonds in the Aurora Butterfly of Peace Collection
The “Type” Classification System of Diamonds and Its Importance in Gemology

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

Read More

Abstracts; Fall 1991

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.

Read More