A designer (L) and sales assistants work on a social media advertisement in a jewellery store at the Diamonds Exchange district in Ramat Gan near Tel Aviv, Israel June 23, 2015. The family businesses that make up the global diamond trade have seen their profits wiped out over the past five years, hit by shaky financing, increased costs and uncertain demand from customers who prefer hi-tech gadgets to bling. Picture taken June 23, 2015. To match Insight MINERALS-DIAMONDS/REUTERS/Nir Elias