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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

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.

An Examination of Four Important Gems

C. W. Fryer and John I. Koivula, June 1, 1986

Several famous and historical gemstones in the Smithsonian's collection are examined and reported on.

Article

Sapphire Quality Factors

Sapphire is one of the big three of coloured gemstones (the other two are ruby and emerald). This durable gemstone captures jewellery buyers with its practicality and aura of romance. Click here to find out more about the factors that make sapphire so desirable!

Ruby and Sapphire Production and Distribution: A Quarter Century of Change

Russell Shor and Robert Weldon

During the past 25 years, the corundum market has been transformed from one of medium to high-priced gems to one that encompasses nearly all price ranges.

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