The IGR Istanbul Gold Refinery 1 Gram. 9999 Fine Gold Bar in Assay Card is a highly sought-after bullion item. This gold bar is uncirculated and composed of 1 gram of. 9999 fine gold, making it a valuable investment piece. Produced by the Istanbul Gold Refinery (IGR) in Turkey, this bar comes in an assay card for authentication and protection. Perfect for both collectors and investors, this gold bar is a symbol of purity and quality in the precious metals market.