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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A first-hand look at Colombia’s emerald mines and the cutting and trading industry in Bogotá.
Read MoreThe average value of rough diamonds mined last year dropped sharply, while demand has trended towards smaller stones and lower qualities.
Read MoreOrganisation for Economic Co-operation and Development reviews issues surrounding sustainable mining practices and increasing returns for artisanal miners.
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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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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.
Read MoreFind out why the number of very large diamonds entering the market has increased sharply in the last few years.
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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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Field gemmologists share the challenges and opportunities of travelling to a Madagascar ruby deposit to collect samples to be used as reference material.
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Geologists braved the rugged and remote terrain of Canada’s Northwest Territories for years until they found diamonds.
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