The exemption, effective retroactively from 1 September, comes under a new U.S. executive order tied to a broader trade agreement between the European Commission and Washington.

The decision means that polished diamonds from Antwerp — which were previously subject to a 15% tariff — can now be imported duty-free into the United States, the world’s largest consumer market for polished diamonds. With annual exports from Antwerp to the U.S. valued at around USD 2.1 billion, the move is expected to provide a significant boost to Belgium’s diamond polishing and trading hub.

“AWDC has strongly prioritized this file, because the agreement is of vital importance and strengthens our competitiveness as both a trading and polishing hub,” said Karen Rentmeesters, CEO of AWDC. “For European-origin goods polished in Antwerp, which account for half of all polished diamond exports to the U.S., the 15% tariff will no longer apply. Beyond Antwerp, this also sets a precedent for other diamond centres to seek similar arrangements.”

Industry stakeholders and policymakers had long argued that the 15% duty was unjustified, as the U.S. has neither diamond mines nor a domestic polishing industry to protect. By securing the exemption, Belgium has highlighted the strategic role its diamond industry plays in global supply, while also easing cost pressures on U.S. jewellers and consumers.

Rentmeesters credited the Belgian government and the European Commission for their coordinated efforts in lobbying for the exemption. “This outcome shows the value of industry and government working hand in hand. It not only benefits Antwerp but could eventually pave the way for a global zero tariff on polished diamonds — a game-changer for diamantaires worldwide,” she added.

The breakthrough strengthens Antwerp’s position as a global hub for diamond trade and underscores its role in shaping future international policy on gemstone tariffs.