Stone set to be auctioned at December ruby auction in Singapore.
Anna Martin to "broaden and deepen GIA's relationships with clients".
Team went on fact-finding trip to emerald and tourmaline mining areas.
Free seminar to discuss gem identification challenges across Japan.
Rare gem discovered in South African mine will enter market from July.
Oculus Rift technology offers unique experience for diamond industry.
CEO Stephen Lussier says figure is milestone for De Beers brand.
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Start-up raised £200,000 via crowdfunding to launch diamond business.
Sleek and contemporary store opening toasted with party on December 3.
Co-founders and managing directors talk engagement rings and diamonds.
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