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A wide choker-style necklace of a row of emeralds with rows of diamonds above and below the emeralds.

Article

Spring 2019 Auctions: Premium Prices for Historic Pieces

Russell Shor, June 14, 2019

Gemstones and jewels with historical provenance are bringing the best prices at the spring 2019 auctions.

The ring is designed with a wavy strip of black diamonds in the center framed on each side with colorless diamonds set in a ruffled edge The earring are crescent shaped with black diamond on the inside framed by colorless diamonds in a ruffled edge.

Article

GIA Researchers Look Inside Black Diamonds

Russell Shor, February 1, 2019

Black diamonds are striking in jewellery. GIA researchers report on the unique properties used to identify black diamonds and the potential treatments.

A sorter works at a table lined with sorted piles of diamond rough.

Article

Diamond Producers Aim for Lower Qualities in Today’s Market

Russell Shor, September 18, 2017

The average value of rough diamonds mined last year dropped sharply, while demand has trended towards smaller stones and lower qualities.

Miners, working in a row along a body of water, use hand sieves to sift gravel.

Article

International Group Sets Sights on Sustainable Gemstone Mining

Russell Shor, July 17, 2017

Organisation for Economic Co-operation and Development reviews issues surrounding sustainable mining practices and increasing returns for artisanal miners.

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.

Article

Is Another 1,000 (or 3,000) Carat Diamond Around the Corner?

Russell Shor, December 12, 2016

Find out why the number of very large diamonds entering the market has increased sharply in the last few years.

Article

Pardieu Brings Ruby Rush to Life with Stories and Updates from Madagascar

Jaime Kautsky, March 11, 2016

Field gemmologists share the challenges and opportunities of travelling to a Madagascar ruby deposit to collect samples to be used as reference material.

Immense glaciers leveled hills and carved thousands of lakes in Canada’s far north. They are pure as distilled water and remain partially frozen most of the year. Even in late June, the ice remained five feet thick in some spots. Photo courtesy Rio Tinto

Article

Bright Light at Midnight: Canada’s Far North Land of Diamonds

Russell Shor, November 20, 2015

Geologists braved the rugged and remote terrain of Canada’s Northwest Territories for years until they found diamonds.

Yellow diamond 17.88 ct., in tweezers, in front of selection of white octahedra, 34.11 ctw. These diamonds came from Kao Mine, Lesotho.

Rough Diamond Auctions: Sweeping Changes In Pricing and Distribution

Russell Shor, January 30, 2015

Examines the growing percentage of rough diamonds being sold through auctions, a shift that has caused price volatility while opening up supply to more manufacturers and dealers.

Sri Lanka: Expedition to the Island of Jewels

Andrew Lucas, Armil Sammoon, A. P. Jayarajah, Tao Hsu, and Pedro Padua, October 31, 2014

Offers a first-hand look at Sri Lanka’s mining, cutting, jewellery manufacturing and retail sectors, where tradition and innovation converge.

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Gemstones

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