See Gem As
Tools
Research
Rapid Sight Estimates of Diamond Cutting Quality
A diamond brilliant’s beauty is the result of a complex combination of angles and proportions. In this article, Richard Liddicoat shows gemologists how to become familiar with how variations in cutting angles can affect a diamond’s face-up appearance.
Abstracts; Summer 2009
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.
Abstracts; Fall 2009
This article, from the Fall 2009 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.
Experimental CVD Synthetic Diamonds from LIMHP-CNRS, France
In the last decade, progress in diamond growth by chemical vapor deposition (CVD) has resulted in significant improvement in the quality of synthetic single crystals.
“Fluorescence Cage”: Visual Identification of HPHT-Treated Type I Diamonds
HPHT-treated type I diamonds of various colors may exhibit unusually intense fluorescence at the facet edges and junctions.
Book Review: Handbook of Spectral Lines in Diamond, Volume 1: Tables and Interpretations
GE POL Diamonds: Before and After
This article explores and identifies the changes that type IIa GE POL diamonds experience before and after HPHT annealing.
Obtaining U.S. Copyright Registration for the Elara Square Cut-Cornered Brilliant Diamond
The U.S. Copyright Office granted what is believed to be the first copyright registration covering a gemstone design.
Fall 2004 Gem News International
A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.
Summer 1981 Gem News International
A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.
Summer 1981 G&G Lab Notes
This section, from the Summer 1981 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.
