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Rare Emerald from China and Pink Sapphire from Sri Lanka

Tao Hsu and Andrew Lucas, April 28, 2016

An emerald from a largely unexplored Chinese deposit is seen at Tucson, along with a pink sapphire recut after removal from a necklace.

34th International Gemmological Conference

James E. Shigley, February 1, 2016

A report from the 34th IGC, held in Vilnius, Lithuania in August 2015.

Tucson 2016

Tao Hsu and Andrew Lucas, April 28, 2016

An overview of the 2016 gem shows.

New Designs from Paula Crevoshay

Andrew Lucas and Tao Hsu, May 8, 2017

World-renowned jewellery artist Paula Crevoshay displays some of her newest pieces at the Tucson gem shows.

Jewelry Television in Tucson

Tao Hsu and Andrew Lucas, April 28, 2016

A look at JTV’s history, current activities and impact on the industry.

Tourmaline and Sapphire from Nigeria

Andrew Lucas and Tao Hsu, May 8, 2017

An update on Nigerian coloured stone production is obtained at the Tucson gem shows.

Unusual Optical Effect in Blue Sapphire

Iurii Gaievskyi, Igor Iemelianov, and Elena Belichenko, July 25, 2014

A bluish violet sapphire shows surprising effects under lab examination.