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Russia group wants to reclaim $270m after state-backed company failed to complete deal
A tradition-bound industry is trying to adapt as jewellery sales fall and consumer tastes change
By going to auction, Lucara’s chief executive took a very public risk that failed
Sotheby’s estimates the Lesedi la Rona’s value at $70m
High prices for large diamonds should not disguise an otherwise ailing sector
De Beers, world’s largest gem producer by value, warns of unstable economic environment
Canadian miner Lucara finds big stones at mine it bought for $45m from De Beers
Sprawling insight and stories behind Africa and its state of flux
Ivory and rhino horn worth $150m burned as part of campaign to end trade of prized animal parts
Loisaba buys cattle, fattens them up, sells them at a better price and shares profits with farmers
Longevity gains provide upbeat counterpoint to gloom enveloping the continent
Would-be disrupters believe technology could rescue the struggling mining industry
Government tries to increase gain from gems
Demand for lesser rocks has faltered and chances of finding ‘specials’ are small
Canadian miner unearths 1,111 carat gem-quality stone in Botswana
Lower oil prices expose Saudi Arabia more than Norway, Kuwait and Abu Dhabi
Oxford research says virus is evolving in response to drugs and is less likely to cause Aids
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