 Net exports of rough diamonds dropped 20.1% to $2.8 billion and net exports of polished diamonds slipped 24.9 percent to $4.3 billion, while net rough diamond imports dropped 12.9 percent to $3.8 billion.The United States is the largest market accounting for 36% of overall export market for polished diamonds while Hong Kong remains at second with 28 percent and Belgium at 8% coming in third.In 2007, when diamonds still constituted almost 24% of Israel's total exports, 12% of world diamonds (by their value) were polished in the country.