1 oz 9999 Gold Bar Rand Refinery (In Assay) Metal Content: 1 troy oz Purity: .9999 Fine Gold Manufacturer: Rand Refinery The 1 oz Rand Refinery Gold Bar is a premier investment-grade bullion product, crafted with .9999 fine gold and backed by a century-long reputation of excellence from Rand Refinery. As one of the largest integrated precious metals refining facilities in the world, Rand Refinery has set the gold standard for quality, integrity, and responsible sourcing since 1920.