Iran's foreign minister said the Strait of Hormuz remains open during the ceasefire period, with gold prices extending gains on Friday. Spot gold rose USD40.3, or 0.8%, to USD4,830.34 per ounce.Gold futures for June delivery climbed USD41.1, or 0.9%, to USD4,849.4 per ounce.Silver futures for May delivery rose 2.8% to USD80.9 pe...