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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

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

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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

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

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Young man reads illustrated gem guide, sitting on a cement bench.
Article
Gem Guide Delivers Education and Social Return to Artisanal Miners

New illustrated gem guide helps small-scale artisanal miners learn more about the quality and classification of the gems they recover.

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Colombian independent miners
Colombian Emerald Industry: Winds of Change

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

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A sorter works at a table lined with sorted piles of diamond rough.
Article
Diamond Producers Aim for Lower Qualities in Today’s Market

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

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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

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

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Four people seated in front of screen. One woman standing the far right.
Article
RJC Panel Explores Coloured Gemstone Issues at Baselworld 2017

The Responsible Jewellery Council holds a discussion on the challenges and issues of certifying coloured gem firms at the 2017 Baselworld fair.

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A close-up image of a pile of rough diamonds.
Article
Ups and Downs of 2016 Make for an Uncertain 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.

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

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

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Large rough diamonds sit on a mirror.
Article
Russia’s Lomonosov Diamond Project Shows its Fancy Colours

Lomonosov yields fancy colours – purplish pink, violet, green, yellow and brown – and a high percentage of gem-quality colourless (D-to-Z) diamonds.

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