Polished imports by weight slid 8 percent year on year to 840,669 carats, with the average price jumping 8 percent to $2,099 per carat. Polished diamond exports, meanwhile, slipped 1 percent to $1.25 billion, meaning net polished imports crept up 1 percent to $517 million.
Rough diamond imports grew almost fourfold to $120 million from $31 million a year earlier, while rough exports more than tripled to $56 million. Net rough imports leapt to $64 million from $13 million a year before.
The U.S. net diamond account for January, representing total imports minus total exports, rose 11 percent to $582 million.