HARARE, Zimbabwe (AP) — A world monitoring group on conflict diamonds said Wednesday it wants restrictions on the sale of Zimbabwe diamonds tightened after calls to relax them by diamond companies in Belgium.

Belgium has argued the controls hurt revenue filtering down to ordinary Zimbabweans. But Global Witness insisted in a statement circulated Wednesday the European nation’s interests were “closer to home” in its diamond center of Antwerp that promotes diamond gifts around St. Valentine’s Day, marked Thursday.