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A notebook, pen, mobile phone with compass app and a digital camera sit on top of a map.

Article

The Stories Behind the Photos: A Gigantic Aquamarine and ‘Gaudy’ Nature

Amanda J. Luke, July 24, 2020

Gemmological photojournalist Robert Weldon shares the stories behind some of his favourite photos.

Man stands at a podium in front of a room of people.

Article

What Country Do My Diamonds and Other Gemstones Come From?

Amanda J. Luke, April 24, 2020

Dr James Shigley shares how GIA determines coloured stone origin and the mysteries of diamond origin.

Man stands in front of an audience giving a lecture – projection screen with image to his right.

Article

Not All That Glitters is Gold — Sometimes it is Mozambican Rubies

Phoebe Shang, March 9, 2020

Learn about Mozambican rubies, including their mining history, characteristics and market demand.

A large red-orange crystal of wulfenite is nestled in the arms of matrix.

Article

Arizona Road Trips: Wild West Gem and Mineral Localities

Sharon Bohannon, November 18, 2019

Arizona’s scenic desert and mountain landscape is the perfect backdrop for a modern Wild West road trip in search of gem and mineral treasures.

A ruby and diamond choker. The centre section is made of six strands of red pearls, framed by rubies and diamonds.

Article

Mughal Jewels Auction: Al-Thani Collection Raises $109 Million (£87.5 Million)

Russell Shor, July 16, 2019

Collectors from around the world descended on Christie's Maharajas & Mughal Magnificence auction of the jewels from the Al-Thani Collection on 19 June.

An Early Byzantine Engraved Almandine from the Garibpet Deposit, Telangana State, India: Evidence for Garnet Trade Along the Ancient Maritime Silk Road

H. Albert Gilg, Karl Schmetzer, and Ulrich Schüssler, August 6, 2018

Analyses the chemical composition and inclusion characteristics of this ancient artefact.

Suite containing over 36 carats of Yogo sapphire

Gemmological Characterisation of Sapphires from Yogo Gulch, Montana

Nathan D. Renfro, Aaron C. Palke, and Richard B. Berg, August 6, 2018

A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.

Man in a hard hat sits in an underground emerald mine.

Article

Geologist’s Newest Mission: Share the Love of Coloured Gemstones

Jaime Kautsky, May 25, 2018

African-born coloured stone specialist visits America and changes his life forever; finding love, earning his GG and starting a new career.

Bracelet containing akoya cultured pearls from Australia

Akoya Cultured Pearl Farming in Eastern Australia

Laura M. Otter, Oluwatoosin B. A. Agbaje, Le Thi-Thu Huong, Tobias Häger, and Dorrit E. Jacob, January 26, 2018

Characterises the akoya cultured pearls produced on the eastern shoreline of Australia using native Pinctada imbricata fucata molluscs.

Colombian Emerald Industry: Winds of Change

Darwin Fortaleché, Andrew Lucas, Jonathan Muyal, Tao Hsu, and Pedro Padua, November 8, 2017

A first-hand look at Colombia’s emerald mines and the cutting and trading industry in Bogotá.

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