The Perth Mint said sales of gold products fell more than 6% month-on-month in April, while silver sales rose to their highest point since October last year.
Sales of gold coins and bars were 75,166 ounces last month, down 6.7% from March's 80,541 ounces.
Silver sales were 1,947,743 ounces, up 6.8% month-on-month.
Benchmark gold spot prices rose more than 1% in April as lingering fears of a recession and turmoil in the U.S. banking sector helped safe-haven flows into bullion. Spot silver prices also rose.
Perth Mint sources said that overall sales of gold products fell slightly, but demand for silver was strong. Demand from wholesale customers in the United States remains particularly buoyant, with investor demand for gold coinage products high.