The U.S. imported $47.8 million worth of rough diamonds in June, more than a third of it from Angola. Gross rough diamond imports increased by 7.9 percent compared to June 2010.

Despite the large gross rough diamond imports, net imports were just $8.1 million, less than 17 percent of gross imports, based on U.S. Department of Commerce figures.

By volume, imports dropped 73.4 percent year-over-year to 21,943 carats. Exports in June totaled 82,683 carats, declining by13.4 percent from the prior year.

By value, most of the goods were exported to Israel ($12.7 million) while by volume Hong Kong was the leading destination (38,996 carats).