There is an uneasy calm in the diamond trading hub in Surat’s mini bazaar. In the past few years, business has not been good, hit by factors like demonetisation, GST, market downtrend and low prices. The raging Punjab National Bank episode is expected to create a trust deficit and push it further down, causing a crisis. This comes at a time when the diamond industry was expecting a return to profitability this year with good demand in its lucrative markets in the US and China. But the Rs 11,400-crore Nirav Modi case is expected to dent its fortunes in the near future.