New Diamond Technology claims to have produced largest man-made gem.
Results for six months ended December 2014 show net profit up 37%.
Revenue soars to £142m but production falls 2% in H1 FY2015.
Gem-A to present its educational courses to worldwide audience.
The WFDB president discusses diamond marketing and the Indian trade.
Sales at latest auction of rough emerald hit £22m at £42 per carat.
DDI to coordinate technical assistance function of Kimberley Process.
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Public support from Lynne Featherstone MP for Gold Standard scheme.
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9ct gold hallmarking rises 23% in December figures
Gold up 20.5% and silver up 7.1% in December 2014 compared to 2013.
Fairtrade boosts 'I Do' campaign with golden stunt
Performers created 'human ring' outside St Paul's cathedral yesterday.
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