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Article

Diamond Quality Factors

Learn about the factors that make diamonds so desirable.

Man sits at his desk with a display stand of multiple pieces of jewelry in front of him.

Article

Alum’s Lifelong Quest: Searching for Jewellery Unicorns

August 14, 2019

Alan Nacht continues his family’s legacy - Bernard Nacht & Co. – and his quest for unforgettable jewellery.

Article

10 Tips for Buying a Diamond Online

September 25, 2013

Looking to buy a diamond online? We have 10 tips to help you click the “Buy Now” button with confidence.

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.

Article

Autumn 2016 G&G: CVD Synthetic Diamonds Survey, Reversible Colour Change in Blue Zircon

Jennifer-Lynn Archuleta, October 31, 2016

A summary of the content found in the Autumn 2016 issue of Gems & Gemology.

Article

How to Protect Your Diamond from Chipping

Al Gilbertson, May 5, 2016

Find out more about what causes a diamond to chip, and 8 tips on how you can avoid chipping your diamond.

Article

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

Jennifer-Lynn Archuleta, April 26, 2016

A summary of the content in the Spring 2016 issue of Gems & Gemology.

These three round brilliant diamonds, weighing 0.76, 0.82, and 0.74 ct (left to right), received Very Good cut grades. Each cut grade covers a range of proportions and can therefore have different appearances. Photo by Kevin Schumacher/GIA

Article

Cut: The 4th C

GIA Research, January 14, 2016

GIA began issuing reports that included a cut grade for round brilliant diamonds in 2006 in an effort to establish standards for cut in the same manner as it has for colour and clarity. This grading system is based on research conducted over the previous decade which was chronicled in several articles published in Gems & Gemology.

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.

Whitish Graining with an Amorphous Appearance

The Impact of Internal Whitish And Reflective Graining on the Clarity Grading of D-To-Z Colour Diamonds at the GIA Laboratory

John M. King, December 1, 2006

This article reviews the GIA Laboratory’s history of reporting on certain types of graining which are often the only characteristics present in large, high-clarity, high-colour diamonds.