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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 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.

A miner holds an emerald in the mine office in the village of Coscuez, Colombia. Photo by Eric Welch/GIA

Article

Emeralds: Colombia’s Buried Treasure

Sharon Bohannon, August 21, 2015

Colombia is home to a rainbow of gems, but emeralds – and the tales of lore that surround them – are the country’s most well-known treasures.

Multi-colored gems are superimposed on an image of glacier peaks.

Article

Gems and Minerals from the Sub-Arctic

Sharon Bohannon, March 17, 2017

Circumnavigate the boreal reaches of the globe to explore gems from polar regions.

Update on Gemstone Mining in Northern Mozambique

Wim Vertriest and Vincent Pardieu, January 27, 2017

Recounts an expedition to Mozambique’s important deposits of ruby, spinel and tourmaline, which have yet to be fully explored.

Diaz needs to crouch low as he makes his way through jungle terrain with a backpack on. He wears boots and gloves to protect him on the uncut path.

Article

30-Year Marine Corps Veteran Fulfils Dream of Becoming a Field Gemmologist

Jaime Kautsky, November 23, 2016

The rigours and often-harrowing conditions of gemmology field expeditions are no match for a 30-year Marine veteran with a love of gems.

Rubies and Sapphires from Winza, Central Tanzania

Dietmar Schwarz, et al.

Since late 2007, rubies and sapphires have been mined by hand methods from both eluvial and primary deposits at Winza in central Tanzania.

A close-up image of a pile of rough diamonds.

Article

Ups and Downs of 2016 Make for an Uncertain 2017

Russell Shor, January 20, 2017

The diamond industry was slow to recover in 2016 and coloured gems got a welcome shot in the arm. Mixed signals leave no clear indicators for 2017.

Gem Localities of the 2000s

James E. Shigley, Brendan M. Laurs, A. J. A. (Bram) Janse, Sheryl Elen, and Dona M. Dirlam

The past decade saw some impressive discoveries of diamonds and coloured stones.

A large ruby crystal in calcite with three faceted rubies in front.

Article

Economists Foresee Bright Holiday Season

Russell Shor, October 17, 2016

National Retail Federation predicts a strong increase in holiday sales; U.S. ban on Myanmar ruby and jade lifted; diamond market report.

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