As total diamond jewellery demand increased marginally to $80-billion in 2016, demand from US consumers ticked up 4.4% to break through the $40-billion mark for the first time. After recording the fifth consecutive year of growth, US consumers now accounted for roughly half of all diamond jewellery purchases globally – a level not seen since before the financial crisis – in a market that remained the fastest growing, industry insight data from De Beers Group showed.